The Toy Box That Wouldn't Stay Shut

Every morning, Priya's little brother dumps every single toy out of the toy box before breakfast.

Priya has to close the heavy lid again and again, all day long. Her arm is worn out!

She wondered: what if the lid could just... close itself? Like magic?

It turns out that "magic" has a name: a servo motor — a tiny motor that moves to exactly the angle you tell it to.

That's exactly what you're about to build. Ready to see it move?

Let's build an arm that moves all on its own!