Fun Express Solar System Stress Balls (9 Piece Set)

Toss around Mars, Venus, Earth and more with these handy stress balls. Great classroom supplies to use as rewards for students who are learning about the solar system, they're also great giveaways to coworkers! Use them as party favors at an astronaut birthday party - these balls are fun and useful, too! (9 pcs. per unit) Foam. 2 1/2"