Season 3
10 episodes · Mar 16, 2026
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S3E1Lava vs Laser Destruction Test
Mar 16, 202623mWhat'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.
S3E2Backyard Squirrel 2.0 - Bank Heist
Mar 16, 202617mMark ups his backyard obstacle course game to keep four thieving squirrels away from a bank vault full of birdseed and a lifetime supply of walnuts.
S3E3Building a Liquid Sand Hot Tub
Mar 16, 20269mWith the right amount of forced air, a hot tub filled with sand can look like a bubbling pot of soup. But how? Mark breaks down the science behind it.
S3E4This Ball Is Impossible to Hit
Mar 16, 202622mMark uses the magic of engineering to level the playing field in a stacked competition against the world's greatest wiffle ball players.
S3E5Vortex Cannon vs Drone
Mar 16, 202621mMark explores the possibilities of anti-drone defense technologies with a crew of backyard YouTube engineers... and the world's largest vortex cannon.
S3E6Glitter Bomb 1.0 vs Porch Pirates
Mar 16, 20268mStolen packages? Not so fast. Mark builds the original "Glitter Bomb" trap to combat porch pirates-and really make them regret their life choices.
S3E7Engineers vs Food Robots
Mar 16, 202613mFrom cereal and milk to spaghetti and meatballs: Things get messy when the CrunchLabs team cooks up new ways to make Mark's mealtimes more efficient.
S3E8Mark Rober vs Ninja Kidz
Mar 16, 20268mIt's not just the Ninja Kidz - it's the whole Ninja Fam! And Mark's challenging them all to a silly series of "Minute to Win It" style challenges.
S3E9Engineers vs Custom Go Kart Racing
Mar 16, 202610mCrunchLabs product designers get 24 hours to build and race their own custom go-karts incorporating engineering know-how-and the element of surprise.
- S3E10
Episode 10