Search for 'duplo marble run'. I've found knockoff versions on ebay for ~$5. My 8 & 10 year old still love to play with the set. It's fun to build and fun to

Search for 'duplo marble run'. I've found knockoff versions on ebay for ~$5. My 8 & 10 year old still love to play with the set. It's fun to build and fun to send the marbles down the path.