Geotracks are one of the most played with toys that I have ever purchase for my children. My 5 year old has had them since he was 3, and plays with them everyday. He loves to see what differnt tracks and setups he can make. My 2 year old daughter also loves teh choo-choos. She is able to put regular track peices together with ease. Big brother has to help with the bigger and more difficult pieces. This is a toy that several children can play with at one time and learn about team work and sharing. This is another toy that will last for generations. Fisher-price has done well on these for sure!