Bring the ocean to life at home with the Robo Alive by ZURU Mega Aquarium Set, the ultimate robotic fish tank experience! This epic 17 piece playset lets kids build, fill, and play with the largest Robo Alive aquarium yet, holding an impressive 3.1 gallons of water. Using ZURUs incredible water-activated technology, just drop in the 4 Robo Fish and 2 Robo Turtles and watch as they swim, dive, and walk just like the real thing. The exclusive set also includes a light-up aquarium, complete with a castle, coral, aquatic plants, and a sandboard to create an underwater world filled with colour and movement. Plus, with LED lighting and colour-change technology, the fish and turtles transform before your eyes, adding even more magic to playtime. With everything included and batteries ready to go, this set is the perfect combination of creativity, imagination, and high-tech fun. It's more than alive, its Robo Alive! Contents: x1 light up fish tank, x4 Robo fish, x2 Robo turtles, x1 underwater castle, x3 corals, x4 aquatic plants , x1 sand board combo, x1 stone. Batteries required: 14 x LR44 button batteries (included).