The World’s Coolest Keystroke, built by [Audiobody], is made from a combination of tennis balls, Lego bricks, servos, and switches. When a tennis ball is lifted up, a Lego arm is actuated.

What are tennis balls made of? Modern tennis balls are made of a hollow rubber core, covered in a wool or nylon shell which is known as the nap. Pressurised air inside the rubber core makes the ball ...

[The Q] decided to solve this problem with a unique design: tires that use tennis balls as the cushioning medium instead. The build begins with small cut sections of plastic water pipe. These are ...

Adding a unique set of three tennis balls to the project was an enhanced play on the materials. “We approached Penn to combine forces to make the first-ever mix-match tennis balls,” he says ...