kids from 8 to 99 can enjoy this set (sorry, you centenarians), which I think is about right. You can enjoy building according to the instructions, or you can go out on your own and make larger and more complicated sets. Especially if you have any other starter or ...
If so, then yes, combining this GraviTrax PRO starter set with the original one would be an ideal combination. If you just want to add height but not width or additional options, you could probably just add theExtension Vertical set, but it doesn’t add any additional tracks or marbles....