Just bought one this weekend for my 7 year old lad, these things are amazing. He'd never ridden a powered two wheeler before, within half an hour he was riding quite confidently up and down the garden, over a concrete block and a hastily constructed small see-saw. They have a hidden adjustable speed controller so you can limit the top speed, very necessary as the will do up to 17 mph. It's light enough to fit on the cycle carrier on the back of the van and being electric it's near silent so doesn't annoy the neighbours. We seem to be getting a good 5 + hours of continuous stop start riding before the batteries start to go flat.