TO TURN ON THE LIGHT UP EASTER EGGS WITH THEIR BRIGHT LEDS OR THE 6 LIGHT FUNCTIONS SIMPLY PRESS THE FLAT FLAP 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, A STILL LIGHT OF A. COMPLIES WITH ASTM, CPSIA, PROP 65. 2.5" H X 2" W