Have this trapezoidal bought old son for our 6 weeks. Despite his young age he has already enjoy it, to look at the bears. It can be set so low that he comes to the hands of the middle bear already tuned. Sometimes we put him in the rocker and set the trapezoid about it, then he comes off at all bears. He wonders again and again about the bells that jingle when he hits it. Him busy for a while! To assemble: mostly it can be easily and intuitively assemble. Only the red bear tighten up, I found a little more difficult, because the holes are not vorgebort. So one has to be careful that it is just. Couple that's also no problem!