To activate the 6 light functions of Light Up Easter Eggs, simply press the flat button on the bottom of the egg. Press once for a fast strobe light of all the LEDs, again for a slow transition through the colors, again for a still light of all LEDs (makes for a soft lavendar glow), or press again to set it on a medium-paced flashing Red, Jade or Blue function. Squeeze the sides of the egg until the battery pack on the bottom can easily be lifted out. Use a small screw driver to remove the screws and remove the batteries. The plastic is a stiff high quality plastic that may make it difficult to remove the battery pack. Specifications: Height: 2.5 in. Width: 2 in. LED Colors: Rainbow Batteries: Includes 3 replaceable AG3 Batteries