The best young inventors in the country are being rewarded at the Cracking Ideas show.
A device to cut soldiers for a boiled egg
The top ideas this year include a hat to keep you awake when doing homework and a machine that walks and feeds dogs so you don't have to!
But what great thing would you invent?
- A machine that does your homework for you?
- A gadget that makes you invisible?
- Or a time travel machine so you could join The Doctor on his adventures?
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"I would make a flying chair that would fly you to school and back everyday. That would be really fun!"
Zoe, 10, Harrogate, England
"I would make a potion to stop mums nagging."
Lloyd, 9, South Ayrshire, Scotland
"I would make a girls-only alarm and put it on the TV so my brother couldn't watch it."
Lauren, 10, Nicosia, Cyprus
"I would invent a portable lie detection machine. Perfect for pranks."
Jose, 12, Lima, Peru
"If I could invent anything, I'd invent a device that stops adults from talking. If they started to shout I'd point it at them and make life bliss."
Kerri, 13, Newry, Northern Ireland
"I would invent a pair of really cute shoes that would grow with my feet."
Katie, 11, Chagrin Falls, USA
"I would invent a friend maker. If you were lonely you could ask it to make a friend for you and out of its chute it would make a completely new person for you to play with."
Paige, 8, Barrow, England
"If I was super smart I would invent a speed limit sign that wouldn't let you go past the speed limit, even if you floor it."
Callum, 12, Doncaster, England
"I would make a robot that could do all my schoolwork and all my homework!"
Alexander, 10, Wellingborough, England
"I would invent a school with no homework and lessons - just lessons on how to eat chocolate and cool stuff!"
Ellie, 10, Plymouth, England
"If I had to invent a "cool thing" I'd invent something so unique to the others, well I would make a machine that cures diseases. It would not only help patients, but doctors too."
Lauren, 11, Wolverhampton, England
"I would invent a dream recorder so that in the morning I could watch my dreams from the night before."
Jasmine, 11, Lancaster, England
"My invention is a robotic hand and you insert anyone's blood or DNA into the machine and it writes in their handwriting! Ideal for prank Valentine letters!"
Sam, 11 and 3/4, Orkney, Scotland
"My invention is a vacuum that lasers out all the dust and puts your room back to its normal state. Then you attach a plug to a computer and you can make your own background for your room. Once you have made your background you save it onto the vacuum and you press a button that changes your room."
Claire, 10, Clapham, England
"I want a machine that does my homework please. I have homework and I hate it. I'd give my left hand for no homework."
Jordan, 10, Carmarthenshire, Wales
"I would invent a robot that would tidy up my bedroom."
Alex, 6, Worcester, England
"I would invent something that makes vegetables taste good, because I hate them a lot."
Jade, 12, Wycombe, England
"I would invent a gadget that looks like a small game, but when you press a button it turns into a car, then a motorbike, then a submarine, then a bungalow."
Meryam, 11, Slough, England
"I would have a robot that helped me in school but is invisible!"
Sophia, 11, Miami State, USA
"I'd like to invent a robot that does what ever I tell him."
Rebecca, 10, Barnstaple, England
"We would love our homework to be done by a machine xx."
Kayleigh and Clara, 11, Belvedere, England
"I would love to invent a mini washing machine that would only wash my clothes!"
Rukhsar, 12, Slough, UK
"I would invent an outfit that could change to whatever I wanted it to be. So one minute I could be wearing trackies and then, if I saw someone I knew, I could press a button and change into a fab outfit!"
Emma, 12, Tottenham, England
"I'd like to invent high heel shoes that can change into comfy flat shoes at the touch of a button."
Newsround presenter Sonali