Colorful Lights flash when bounced Balls feature Transformers Perfect for indoor and Outfoor Play For night and day play 4" in diameter Light up the night with the Hedstrom Transformers Light Up Ball! This ball lights up and features Transformers graphics, great for any Transformers fan in the house! Play all day and night with the Hedstrom Transformers Light Up Ball! Just bounce and watch and watch your Transformer light up.