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Grow Your Own Willy by MDI Australia

$9.99
$9.99

Water-activated expanding polymer grows from small to 12 inches over 72 hours. Hilarious novelty gag gift for bachelorette parties and adult celebrations.

Key Features:

Expanding polymer grows to impressive 12 inches over 72 hours

Non-toxic materials ensure safe entertainment for all party guests

Water activation starts growth within just 2 hours

Perfect timing builds anticipation throughout weekend celebrations

Creates endless photo opportunities and social media content

Vendor: MDI Australia
SKU: NV-572-NOATTRIBUTES-SHOP-NONE-55062
Availability: Out Of Stock
Product type: Bachelorette and Bucks
Please hurry! Only 0 left in stock

The Grow Your Own Willy from MDI Australia is a novelty party item made from expanding polymer that grows up to 6 times its original size when placed in water. Simply add water and watch it expand from modest proportions to approximately 12 inches over 72 hours, creating hilarious entertainment for bachelorette parties and adult celebrations.

Grow Your Own Willy Specifications

  • Brand: MDI Australia
  • Material: Expanding polymer
  • Size: Grows up to 12 inches (6 times original size)
  • Key Feature: Water-activated expansion
  • Ideal For: Bachelorette parties and adult-themed celebrations

Why Choose the Grow Your Own Willy

  1. Massive Growth: Expands to an eye-popping 6 times its starting size for jaw-dropping reveals that get everyone laughing
  2. Perfect Timing: Starts growing in just 2 hours but reaches full size in 72 hours for maximum party anticipation
  3. Safe Fun: Made from non-toxic expanding polymer designed purely for entertainment and endless photo opportunities

How the Grow Your Own Willy Works

Drop it in room temperature water and the magic begins. The expanding polymer starts swelling within 2 hours, gradually transforming from a modest little guy into an impressive 12-inch conversation piece. You can pair it with other fun party accessories like our party dolls for the ultimate celebration setup that will have everyone in stitches.

What makes this different from basic gag gifts is the multi-day growth process. Instead of instant laughs that fade quickly, this keeps building anticipation throughout your entire celebration weekend.

Grow Your Own Willy Features

  • 6x Expansion Power: Grows from tiny to 12 inches of hilarious party entertainment
  • Simple Water Activation: Just add room temperature water and let the growing begin
  • Perfect Growth Timeline: Starts in 2 hours, fully grown in 72 hours for weekend celebrations
  • Photo-Ready Fun: Creates endless opportunities for time-lapse videos and party photos

Party Novelty Comparison

Style Best For What Makes It Different
Grow Your Own Willy Multi-day celebrations Expands dramatically over 72 hours for ongoing entertainment
Instant Gag Gifts Quick laughs Immediate impact but short-lived novelty
Static Party Props Photo opportunities Fixed size with no interactive element

Who the Grow Your Own Willy Is For

Bachelorette Party Planners: Anyone organizing a memorable hens night will love how this breaks the ice and keeps guests entertained throughout the weekend. Perfect alongside other adult party accessories like our life size sex dolls for maximum laughs.

Adult Birthday Celebrations: Guys and girls planning cheeky birthday parties will find this creates the perfect conversation starter that bonds groups together through shared laughter.

Why the Grow Your Own Willy Delivers

This thing is pure entertainment gold. While other novelty items get a quick laugh and then forgotten, this keeps the party going for days. The anticipation builds as everyone checks its progress, and by the time it reaches full size, you have got a legendary party prop that creates memories lasting way beyond the celebration. Plus you will get some epic social media content out of it.

From the Community

Real experience:

I bought this for my sister's bachelorette weekend and it was the highlight of the entire celebration. We started it growing on Friday night and checked its progress at every event. By Sunday it had reached full size and became our unofficial party mascot for photos.

The laughter this thing generated was incredible. Even the shy family members were cracking up and posing with it. It completely broke down barriers between people who barely knew each other and created this shared joke that had everyone bonding instantly.

Explore More

The Grow Your Own Willy is part of our wider range of adult novelty items. Discover more options in the waterproof vibrators collection to find exactly what you are looking for.

Get the Grow Your Own Willy

Ready to add some growing excitement to your next celebration? Order your Grow Your Own Willy today from MaleChastity.com.au with discrete shipping Australia-wide. Your party guests will never see it coming.

Malechastity.com.au ships with Australia Post. We ship from Sydney.

All in-stock orders placed before 12pm AEST (Sydney Time) on business days are generally processed on the same day. Packages are usually received 1-6 business days after shipping, but may subject to any postage carrier related delays beyond our control.

Free standard shipping on orders shipped within Australia above $200. For orders below $200 standard shipping within Australia is $12.95 and will be added at checkout.

Orders addressed to P.O box, G.P.O box or Parcel Collect will be handled by Australia Post. Extra time should be allocated for these orders.

Shipping Transit Times (Including Free Shipping)

Shipping time refers to the estimated time that it will take to deliver your order after it’s ready to ship (Please note this does not include time to process your order). Shipping time does not commence after your order is put through but begins the moment your order has been processed and is ready to dispatch via the our freight carrier..

1. Major City & Metro Areas (within Australia)

All in stock orders are generally processed on the same day the order was placed on business days for orders received before 12pm. Generally, orders are processed and shipped the same day or next business day.

Orders are typically received 1-6 business days after shipping. For larger packages please allow an extra 1-2 business days for delivery.

If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from the nearest depot location.

2. Rural Areas (within Australia)

All orders are generally processed on the same day the order was placed on business days before 12pm.

Generally, orders are processed and shipped the same day or next Business day.

Packages below 2kg are usually received 3-6 business days after shipping. For larger packages please allow an extra 1-2 business days for delivery.

If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from the local Australia Post depot.

International Shipping

The price for international shipping is AU$12.95 for orders equal to or below 0.399kg (399grams), and AU$22.95 for orders with a total weight equal to or above 0.4kg (400 grams).

All in-stock orders placed before 12pm AEST (Sydney Time) on business days are generally processed on the same day. Packages are usually received 6-30 business days after shipping. 

If no one is available at your delivery address to accept your order a second delivery may be scheduled or you will be notified that your order can be collected from your nearest delivery depot.

Please note in regards to all orders

– These expected delivery dates/times are based on carrier shipping practices, your destination, and the items in your order.
– Expected delivery dates are estimates. Orders can be delayed due to fraud verification or the time of the order being placed. Items that are not regularly stocked cannot be held to the expected delivery dates.
– Orders may be delivered in separate shipments.
– The order cut off times are based on normal Business Hours and exclude weekends and Holidays: Monday – Friday 12 pm
– When your order ships you will receive an email from us with a link to track your order.  If you receive your tracking number before 6 pm (AEST) it may not be updated on the Carrier’s website until that evening.

Due to large amounts of online credit card fraud, all orders are subject to approval by our payment verification department. We will notify you by phone or email should your order be delayed.

We have a 14 day return policy, which means you have 14 days after receiving your item to request a refund for any defective products.

Returns and exchanges are only available for faulty items, goods not as described, or in some instances, for incorrect sizing.

Due to health and safety regulations, Maleshastity.com.au cannot resell any returned or exchanged products.

This policy is in place to prioritise your well-being and ensure that you receive the highest standard of hygiene and quality in all products.

To be eligible for a refund, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging.

You’ll also need the receipt or proof of purchase. We do not issue refunds for change of mind or incorrect choice.

Under Australian Consumer Law, we are not obliged to accept returns for “incorrect choice” or “change of mind” so please choose your products carefully. 

Any freight and insurance costs to return the item to us are at your expense. This includes the liability for any lost freight – send via registered post.
If your return request is accepted, we will provide you with all instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

Damages and issues

Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Exceptions / non-returnable items

We do not accept returns for any products that have change of mind, damaged products, or for products that have been used or do not have their original packaging.

Please get in touch if you have questions or concerns about your specific item.

Unfortunately, we cannot accept returns on sale items or gift cards.

Refunds

We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 7 business days.

Please remember it can take some time for your bank or credit card company to process and post the refund too.

Frequently Asked Questions

What is the Grow your own Willy and what type of novelty item is it?
A hilarious party novelty from MDI Australia, the Grow your own Willy uses expanding polymer technology to transform from tiny proportions into an impressive 12-inch conversation piece when placed in water, creating unforgettable entertainment for bachelorette parties and adult celebrations.
How does the Grow your own Willy expand when activated with water?
Water triggers the expanding polymer to begin swelling within just 2 hours, gradually growing to 6 times its original size over 72 hours. This multi-day transformation keeps party anticipation building as guests watch the Grow your own Willy reach its full jaw-dropping dimensions.
Do you need special preparation steps to activate the Grow your own Willy?
Simple room temperature water is all you need to start the growing magic. Drop the Grow your own Willy into water and the expansion begins automatically, requiring zero preparation or special setup while delivering maximum entertainment value throughout your celebration weekend.
Could men new to chastity benefit from the Grow your own Willy for party entertainment?
Party planners organizing bachelorette weekends, birthday celebrations, and adult-themed gatherings find this creates legendary entertainment. Guys planning cheeky parties and anyone wanting to break ice between guests will love how the Grow your own Willy bonds groups through shared laughter.
Do you get discrete shipping when ordering the Grow your own Willy from Australia?
Discrete packaging protects your privacy when ordering the Grow your own Willy from MaleChastity.com.au, with Australia-wide shipping ensuring your party guests never see the surprise coming until you reveal this expanding entertainment masterpiece at your celebration.

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