Place the Glow-In-The-Duck in a bath and watch the water-activated LED bulbs inside the duck light up and change colour. Perfect for bath, pond or pool - it takes like a duck to water! The Glow-In-The-Duck is a sealed unit containing the batteries and LED bulbs. While the batteries are not replaceable, the battery lifetime is approximately 45 hours use which is the equivalent of 180 fifteen minute baths! Whether they love or hate bath time, Glow-In-The-Duck is a perfect gift for any child over the age of 12 months.