Gadget Master

Continuing the biking theme, check out the ErockIT, the invention of Stefan Gulas. Half push bike, half motorbike, all electric. It can go at speeds of up to 50 miles per hour (80km/h).

He describes it as "a new kind of highly emotional electric motorcycle".

There are petrol-engine powered bicycles out there, but this is greener. You peddle to increase acceleration (there is no accelerator on the handles).

"The quicker you peddle, the quicker the motor goes," says Stefan.

If you want to buy it, though, it's not cheap. It will cost you 30,000 euros.

For more details on electronic bikes, see one of our recent articles - Kingston Uni electric bike heads to Isle of Man for TTXGP race