With these brightly colored return balls, little ones will develop hand-eye coordination without even realizing it! These small toys are great as Halloween giveaways for trick-or-treaters, pool party favors and so much more. The small rubber balls are attached to a string and a ring, and they'll test kids' coordination much like a yo-yo. Rubber. (4 dozen per unit) 1" ball on 12 1/2" string.