For 3 days straight, immediately after breakfast, the girls wanted to get out their Christmas present from Grandma and Grandpa B:
No, I made this big one, but both girls seem to understand how the run works after playing with it for a bit, so they each take a pile of blocks and go to it. The only downside of this run is how easy it is to bump out of position, but that goes along with what I love so much about this particular one - its versatility and ease of use. Nothing snaps together or can break: you just stack the blocks in the right way and the marbles run through and along them!Marble runs: physics at its best! Yay gravity!
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