This fluorescent Yellow Duck is one of our popular collectable 'Glow in the Duck' iDucks! He has LED lights and a battery. [Battery not replaceable] When placed in water he will light up and change through various colours. The light will turn off when the duck is removed from the water.  …Because one duck is never enough! If you want to buy 10 or more in one style of duck we will offer a discount. The more you buy the more you save! Please call or email our team at JustDucks for details.