These are the fabulous I-Ducks!! These Ducks are 10cm long, 8 cm wide and stand 9 cm high and are presented in their own designer boxes. They are so special, containing coloured LED's and a battery, that when they are placed in the bath, or in water, the LED's are activated and they slowly fade between red, green and blue. When removed from the water the LED's switch off again. The battery life is around 45 hours!! that's around 180 15minute baths!! The duck is a sealed unit and the batteries are NOT replaceable.