These are very sturdy and well-made. The balance planks have two sides - one is flat, which is great for younger kids. The other side is curved to make balancing a little harder. My son loves trying to balance on this with help, and he also uses it as a track for his cars. Great for some exercise inside in the winter but would also be a good outside toy when the weather is good again. It also breaks down and stores really quickly and easily.