Mark Rober likes to set up bird feeders in his backyard. The only problem is that it's not only birds that like to take advantage of them — squirrels also like to get in on the action. But why make it easy for them?! That's why Mark has made it his mission to build an elaborate maze leading to "Fort Nuts," a giant vault full of nuts. Well, it turns out that when free nuts are involved, squirrels won't stop at anything until they break into the vault.
If you're a fan of Mark and want to take part in his engineering class, head over to Monthly.com/MarkRober.