MakerState Twitterissä: "STEM PROJECT 🔬 We lifted pennies in our LEGO® pulley system, but anything with some weight would work – marbles, rocks, etc. Instruction Here: https://t.co/niXX8A8IiN #education #sciencelab #scientists #scienceisreal ...
60 LEGO Technic 4185 Pulley Wedge Belt Wheel - for sale online | eBay
LEGO Education Simple Machines: Pulleys - Confessions of a Homeschooler