Mark Rober's CrunchLabs - Season 3

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 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.

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.

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

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

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

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.

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.

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