Glowing and expanding, expanding and glowing!This fun and educational glowing sphere will have you enjoying the dark like you never have before. Starting off at 5 ½” and ending up at 12”, you control its geometrical expansion by simply pulling with your hands. Hang it from the ceiling for a cool glowing beacon at night, or toss it back and forth with your friends. A game and activity sheet is included. For ages 4 and up.