It's people like you!


It’s all about you!
When you build one of our kits you instantly become part of a growing community of awesome BYO STEMgineers!

Join our Summer Challenge!

25th July to 4th September

Calling all STEMgineers! We’re challenging you to get creative this summer!

Whether you like to build, create, design or draw – our Summer Challenge is going to be lots of fun.


How does it work?

Each week, we’ll be sharing a new STEM-based challenge for you to get involved with.

You can complete them however you like. It’s all about having a go!

Use materials you have around the house (don’t forget to ask for permission!). Or sketch your design on paper, a tablet or computer.

It's completely up to you!

Cool prizes to be won!

Each week, we’ll pick a winning design and share it!

You could win a:

A personalised
BYO STEMgineer
Trophy to build

Good luck!

It's so easy to enter!


Look out for our weekly challenges on Instagram and Facebook.


Take a photo of your entry.


Ask an adult to share it on Facebook or Instagram.
Don’t forget to tag us #byokits


You can enter by asking a grown-up to email your design to us at:

Don’t forget to download and print your Yo! character to include in your challenge.

Each Wednesday we’ll pick a winning design from the previous week’s challenge and share it on social media. It’s going to be an awesome BYO STEMgineer Summer Challenge. We can’t wait to see what you create!

Build Your Own’s STEMgineer Summer Challenges are open to UK residents only.
There is no entry fee or purchase necessary to take part or enter. Full details of how to enter the weekly challenges can be found here.

Follow us!

Follow us on Facebook or Instagram to keep up with our Summer Challenge, fun facts and more. You might even spot your design!

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By submitting this form, you agree to our Terms & Conditions.

BYO STEMgineers Summer Challenge Terms and Conditions

Build Your Own’s STEMgineer Summer Challenges are open to UK residents only. There is no entry fee or purchase necessary to enter or take part.

Closing dates for the challenges will be detailed each week on Facebook and Instagram. After this date, no further entries will be permitted. No responsibility can be accepted for entries not received for whatever reason.

The weekly prize is as follows: 1 x Build Your Own personalised cardboard trophy, and a £5 voucher to spend on The weekly prize is as stated, and no cash or other alternatives will be offered.

Summer Challenge winners will be selected each week by the Build Your Own team from all entries received. Challenge winners will be announced the following Wednesday on Instagram and Facebook, along with an image of their entry.

The winner agrees to the use of his/her name and image in any publicity material, as well as their entry. Any personal data relating to the winner, or any other entrants will be used solely in accordance with current [UK] data protection legislation and will not be disclosed to a third party without the entrant’s prior consent.

This promotion is in no way sponsored, endorsed, or administered by, or associated with, Instagram, Facebook, Twitter, or any other Social Network. You are providing your information to Build Your Own and not to any other party. The information provided will be used in conjunction with the following Privacy Policy found at

By entering this competition, an entrant is indicating his/her agreement to be bound by these terms and conditions.

Build Your Own shall have the right, at its sole discretion and at any time, to change or modify these terms and conditions, such change shall be effective immediately upon posting to this webpage.

Build Your Own also reserves the right to cancel the competition if circumstances arise outside of its control.