A competition for all the family, to celebrate the Wallace and Gromit exhibition at London鈥檚 Science Museum.
Feedback has teamed up with Carlton Books to offer you the chance to win a signed copy of by Penny Worms.
This fun hardback is packed with information about Wallace鈥檚 cracking contraptions and his madcap adventures with Gromit, from A Grand Day Out to A Matter of Loaf and Death.
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All you have to do is write to us describing in no more than 100 words your own Wallace and Gromit style invention. You might find some inspiration in our gallery.
The best entry will receive a copy of the book signed by creator Nick Park, with four runners-up receiving an unsigned copy.
How to enter
Please read the Terms and Conditions before entering.
Use the comment form at the foot of this article to submit your answer. Please start a new thread, rather than replying to an existing comment.
Please remember to include a working email address (in the correct box in the form, not in the comment itself) so we can reach you if you are our winner. It won鈥檛 be used for any purpose other than the competition.
The competition closes on 4 May and no entries will be accepted after that date. The results will be published in the 16 May issue of New Scientist.
The editor鈥檚 decision is final.