Water activated LED light up ducks'Pondtrooper Duck' from our 'Pond Wars series' Illuminating Bath Duck, water Activated Gift – Child Safe Simply place the Duck on the water and watch the automatic colour changing LED bulbs light up and slowly cycle through colours.Info:The Internal light turns on with contact with water, and off when duck is removed. It takes like a duck to water! The battery lifetime of the Glow-in-the-duck is about 30 hours, the equivalent to 120 fifteen-minute baths! All ducks contain x3 LR44 (AG13) button cell batteries and colour changing LEDs. Batteries are accessible through a small sealed hatch on the bottom of duck. Batteries are replaceable. Product Dimension: 7 x 10 x 10 cm / 2.8 x 3.9 x 3.9 inPackaging Dimension: 13 x 12 x 12 cm / 5.1 x 4.7 x 4.7 in