Excellent kart. My kid and neighbor kids love it. It was easy to assemble, it is very light compared to his friend's 40lb kart so he has much better power to weight ratio ;-) FTW! My 2y5mo old uses the farthest seat setting but he is very tall for his age. I think we will need to upgrade to something bigger sooner than age of 5. Also, this thing needs a bell ;-) I also drilled a hole in plastic frame end cap and mounted a tail light. Every two year old appreciates bells and blinking lights!