Season 3

1. Lava vs Laser Destruction Test

2026-03-16 · 23m

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.

2. Backyard Squirrel 2.0 - Bank Heist

2026-03-16 · 17m

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.

3. Building a Liquid Sand Hot Tub

2026-03-16 · 9m

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.

4. This Ball Is Impossible to Hit

2026-03-16 · 22m

Mark uses the magic of engineering to level the playing field in a stacked competition against the world's greatest wiffle ball players.

5. Vortex Cannon vs Drone

2026-03-16 · 21m

Mark explores the possibilities of anti-drone defense technologies with a crew of backyard YouTube engineers... and the world's largest vortex cannon.

6. Glitter Bomb 1.0 vs Porch Pirates

2026-03-16 · 8m

Stolen packages? Not so fast. Mark builds the original "Glitter Bomb" trap to combat porch pirates-and really make them regret their life choices.

7. Engineers vs Food Robots

2026-03-16 · 13m

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.

8. Mark Rober vs Ninja Kidz

2026-03-16 · 8m

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.

9. Engineers vs Custom Go Kart Racing

2026-03-16 · 10m

CrunchLabs product designers get 24 hours to build and race their own custom go-karts incorporating engineering know-how-and the element of surprise.

10. Episode 10