Michael Werneburg 5 We bought this set for our kids for Christmas in 2020. It was a huge hit. The product encourages immediate comprehension of how the parts all work, and the kids (aged 8 and 12) got right into it, making multi-level marble runs follow two or three paths in circuits that crossed and fell. Everything is well very made and even attractively designed. The magnet piece is sheer genius - put two silver balls on the "downhill" side of the magnet and any ball that rolls from the "uphill" side will cause the second silver ball to shoot down the run at an accelerated pace.This is our third product from Ravensburger. We have a board games called Labyrinth and Funny Bunny that we still play after a couple of years. This manufacturer makes great stuff.