Today, the ball track arrived and we (our little boy, 18 months and I) are excited. The individual balls and rolling elements run cleanly through without a trailer - what in many other marble run was not the case that we had already ordered and let them go back. The stability is ok - could be the track certainly screws on a large wooden board, if you want to have 100% stability. But as I said, it is also so well. The fun factor is great, especially the colorful wooden balls are all the rage. The workmanship is very good - it clatters nix on the railway. Price-performance: Top !!!! If the railway buy again and / or recommend a friend.
PS: the train manufacturer lt suitable from 2 years.. I think they can still use already for children from 1,5 years. It promotes fine motor skills.