Got a question?

Wondering what ‘STEM Toys and STEAM toys for children’ means? Maybe this will help…

STEM/STEAM stands for Science Technology Engineering and Maths (the “A” is sometimes used to represent Arts). STEM toys encourage open-ended play and trial-and-error exploration, teach problem-solving, and allow children to lead the play experience, among other attributes. If you’re interested you can read more on The Toy Association website.

While the kits are fairly simple to construct, there may be a couple of steps that you might struggle with. You could use this as a great opportunity for a bit of family time to share the experience and learn together. If you need extra help, head to our Support page to watch us build the kits step-by-step.

You most certainly can! We hate it when that happens, so contact us directly by heading over to our Contact Us page and we will sort out a replacement for you.

Yes they do! We use high quality card and cardboard, source the best lenses, mirrors, elastic bands and marbles, and combine with very clever cardboard mechanics to make products that really do work.

They are made by our trusted printer partners who use FSC and other sustainable/recycled cardboards. Our packaging is designed to minimise waste and space during transportation and if produced overseas they are sent to us on a container ship, along with other manufacturers’ products such as computers, washing machines and toys. This is more fuel efficient and better for the environment than flying them here.

Yes we do, but that would be telling! We have great plans for the future of Build Your Own, so follow us on Instagram or Facebook to be the first to know.

If none of that has helped, head over to our Contact Us page and send us a message.

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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.