Mark Rober had a problem. Squirrels, those jerks, kept stealing his bird seed. His solution? Building an incredibly intricate squirrel-proof bird feeder, which he created using mechanical engineering.

What's the most destructive substance on Earth? Lava's the reigning champ - but how do lasers stack up? Mark and his friends are about to find out. Mark ups his backyard obstacle course game to keep ...

GO ‘NUTS’ FOR STEM. Squirrel Dash Game from Moose Toys and CrunchLabs by Mark Rober brings Rober’s viral squirrel obstacle-course chaos to the tabletop in a wild, STEM-fueled tabletop chain-reaction ...