easy to assemble (bring a 5mm Allen key), these are my children 6 and 8 years who have assembled in 5 minutes (I just tweaked the tightening: 2 screws to tighten), toy that is not suitable for large (over 4 years) because it is rather short knee), ideal between when he walks and 3 years. The wheels are made of a hard rubber or a flexible plastic, it is relatively quiet, but the wheels are still not foam so you can hear a bit on the wooden floor.
