Brought this for my 3 yr old boy/girl twins. Neither was getting the whole peddling thing on their trikes, so i thought i would try another tack.. Found it very easy to assemble (and i am not good at these things!), and my son immediately loved it - and has hardly been off it since. He is excellent at balancing on it after just a bit of practise, and now happily whizzes down the grass hills at our local park with his legs stuck out to the sides! My daughter hasnt sussed the balance thing so much, still likes to 'walk' on it but to be fair, she hasnt had much of a look-in! Theyre getting proper bikes for xmas, so it will be interesting to see how it helps my boy progress on to that... but, I wouldnt hesitate to buy one, they are just excellent and get those kids out and moving eagerly!