Mark & Science Bob demonstrate a series of experiments and scientific demonstrations to make your Summer more fun (and educational!)
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Mark tests his pet octopus' survival skills & puzzle-solving abilities
Has anyone been able to defeat Mark's tennis ball cannon challenge?
Mark uses the science of air pressure to make sand act like a liquid.
Mark uses his engineering skills to re-live his childhood Wiffle Ball dreams.
Mark built the world's largest Frisbee launcher! Here's how he did it.
The grand finale! Are lasers really the most destructive thing Mark can get his hands on?
Mark added rockets to a golf club to improve his game.
Mark de-mystifies 7 scientific mysteries you never knew you didn't know!
Can Mark build a batter battle-ready robot than the guys from Dude Perfect
Mark took a field trip to Disneyland to prove the power of lasers!
Mark & Jesser compete using the world's largest Nerf crossbow!
Part 5! Porch pirates aren't the only ones who need to fear the Glitterbomb now.
Mark & Science Bob demonstrate a series of experiments and scientific demonstrations to make your Summer more fun (and educational!)
Mark built the world's largest coin spinner! Here's how he did it.
Mark built a giant, world-record-setting, NERF gun!
Mark built a 7 foot long Super Soaker and set a world record!
Mark sets out to discover if someone would sink or float if they swam in a pool filled with water balls.
Mark wanted to know what it would be like to to bounce on a trampoline with 1,500 water balloons, so he built it, filmed it, and put it in slow mo!
Mark built the world's smallest NERF gun, and the outdid himself 4 more times.
Mark de-mystifies 7 more scientific mysteries you never knew you wanted answers for.
Showing1to20of1988results
