9/9 It's the final, featuring the bike safety system and the device to protect marine life.
8/9 Ideas include an idea to protect marine mammals and a way of making electricity in space.
7/9 Ideas include a device to stop baths overflowing and an invention to make cycling safer.
6/9 Ideas include a multipurpose tracker bag and an exercise boot.
5/9 Ideas include a warning system to protect sealife and a unique way to stop cars crashing.
4/9 Ideas include a robot to help around the house, a tree simulator and energy from space.
3/9 Ideas include totally green electricity and a communication device for the deaf.
2/9 Ideas include voice-activated doors and some ingenious ways to make cycling safer.
1/9 Three young inventors who must try to convince the judge that their idea is genius.