Nothing impresses a kid like brandishing a knife and saying, “Let’s cut that open and see what’s inside.” Here are three household objects that are fun to slice apart. And one you really shouldn’t.
Baseball
Is it safe to open? Yup.
Technique: Put it in a vise, then go at it with a hacksaw.
What your kids will learn: That the material inside affects the ball’s behavior. Cores used to be made of rubber but were changed to cork in 1910. This made the ball more bouncy, ushering in the “live ball” era that allowed Babe Ruth to become a legend. But home runs shouldn’t be too easy, which is why the outer layers consist of yarn, deadening the ball.
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