These light up propellers are great for night time play. Propeller lights up when stick is pushed completed inside the propeller. 2 LED lights, 1 in each wing. For best flying results put between your palms and move your hands in opposite directions and toss in the air. Propellers will spin and create a rotating light. Use these in party favor loot bags at your next party or night time event. Everyone will love playing with these flashing toys.