To activate Flashing Crazy Hair Puffer Ducks, just bump the bottom of the duck and lights flash for about 13 seconds. NOTE: Do not use near water. Duck Dimensions (W x H): 1.5" x 1.75", and crazy hair stretches out to 11"! LED Colors: Red, Blue, Green Puffer Duck Colors: Blue, Green, Orange, Pink, Purple & Yellow. You cannot pick & choose specific colors from assortment. One duck per quantity ordered. Ducks come ready to use & equipped with non-replaceable batteries.