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 ...

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.

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 ...