S3 E123 min
Lava vs Laser Destruction Test
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 Rober's CrunchLabs
Season 3
A season summary is not currently available.
10 episodes · First aired 2026-03-16
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Episodes
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Showing 10 at a time
S3 E217 min
Backyard Squirrel 2.0 - Bank Heist
Mark 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.
S3 E39 min
Building a Liquid Sand Hot Tub
With 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.
S3 E422 min
This Ball Is Impossible to Hit
Mark uses the magic of engineering to level the playing field in a stacked competition against the world's greatest wiffle ball players.
S3 E521 min
Vortex Cannon vs Drone
Mark explores the possibilities of anti-drone defense technologies with a crew of backyard YouTube engineers... and the world's largest vortex cannon.
S3 E68 min
Glitter Bomb 1.0 vs Porch Pirates
Stolen packages? Not so fast. Mark builds the original "Glitter Bomb" trap to combat porch pirates-and really make them regret their life choices.
S3 E713 min
Engineers vs Food Robots
From 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.
S3 E88 min
Mark Rober vs Ninja Kidz
It'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.
S3 E910 min
Engineers vs Custom Go Kart Racing
CrunchLabs product designers get 24 hours to build and race their own custom go-karts incorporating engineering know-how-and the element of surprise.
S3 E10Air date unavailableUnaired
Episode 10
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