Welcome your new family from under the sea! Set up the light-up habitat, pour in some water, add the HydroEggs with some HydroGrub and watch your new instant pet hatch! Watch them hatch, grow, and swim: You'll be able to enjoy your very own pets happily swimming around your tank for months as they grow, mature, and have children of their own. And that process is sure fun to study and watch. Let it Glow: Includes a built-in innovative LED light that transforms the experience into something magical. Turn on the light, choose your desired color, and your HydroWorld turns into a gorgeous illuminated tabletop aquarium. You have to see it to believe it! All-inclusive kit: Light-up HydroWorld tank, USB power cable, HydroEggs, HydroGrub, serving spoon, bubblizer wand, decorative stickers, and easy step-by-step instruction and learning guide.