After revealing the at-home Super Challenges, Mark competes with his nephews and special guest Pierson in the Velcro Lympics. Featured planet: Mercury.

It's safety first at Camp CrunchLabs when Nathan and Gabe of Unspeakable join Mark for some explosive fire-related science. Featured planet: Venus.

Mark welcomes Max from Toys and Colors to learn about lasers and try to make it through a challenging three-part maze. Featured planet: Mars.

Let the world's most epic Nerf battle begin with special guest Zach King... and a custom-fabricated Nerf artillery vehicle. Featured planet: Jupiter.

Muppet Labs comes to Camp CrunchLabs with a high-powered cannon, 70 rubber chickens and special guest Kermit the Frog. Featured planet: Saturn.

F is for family! Adley, Shonduras and Niko meet a real astronaut then test out a device that simulates gravity on other planets. Featured planet: Uranus.

One room. 10,000 balloons. Tons of fun. Add Mark Rober, Matthew Beem and a little science — and anything's possible! Featured planet: Neptune.

On the last day of camp, Mark signs off with a bang by destroying the Camp CrunchLabs set with some mind-blowing science. Featured planet: Earth.