Toys play a crucial part in development of a child. Toys as simple as wooden blocks or numbered puzzle, develops cognitive and physical skills. Complex puzzles, remote control cars, bubble guns helps learn and analyse cause effects and spatial relationships. Babies tend to play more and more with such toys and make themselves happy. Children's attitude towards their toys nurtures them big way. Features To activate your 12 oz Mini Opaque Acrylic Tumbler with Lid and Straw Remove pull tab and press button located on the base of the cup Specifications Capacity: 12 oz LED Colors: Multicolor Mode: 8 light functions Batteries: 2 Replaceable AG13 Batteries pre-installed Printable: Yes Cup Dimension: 3.25" x 4.5" Straw Dimension: 7" Weight: 0.29 lbs