Haba Kullerbu Ball Track System
Haba's Kullerbu for toddlers, creatively combines the best of trains and marble runs. It's perfectly designed for ages 2 and up with a click system that snaps tracks stably into place.
Kullerbu balls not only roll down track, but can also "hop aboard" a variety of vehicles. There are even vehicles which come with a friction based motor that can climb the track with a little push and move balls back up the track. All sets combine together for endless building combinations. Check out the video to see more.