Rock and a Feather

What weighs more - a rock or a feather? Join a curious boy as he explores the amazing world of mass and weight! He discovers how scales work, learns about kilograms, and even thinks about how much the whole world weighs. From elephants to water drops, there are so many things to measure. But here’s the big question: how many feathers would it take to equal one kilogram? Grab a scale and find out!