This is a sturdy little scooter.  My four year old loves it.  We got the helmet, elbow and knee pads and the biking gloves to go with it and he feels like he is really getting a fun time like the big kids.  And the adjustable handlebars really makes a difference because he is in the upper percentiles for height.  He hopped on and it took maybe an hour or two before he really got the hang of it and now he is going going going.  Excellent workout, he enjoys it so much and I love that it is very sturdy as well. We also contacted customer service and they were really nice.  No assembly required.  Just take it out of the box and off you go on your way to fun!