Magic Aquarium - Sea Turtle from Deluxe base. Grow your own penguins in this toy fish tank kit for kids. Just add water and see your 2 tiny pet sea turtles magically grow before your eyes! It will take them up until theyre 2-4 days old to grow to more than 8 times their size! After theyre fully grown they will need their water changed every few days to keep it clear. , , A great way for your child to learn how to handle responsibility! The toy fish tank is 8cm x 4cm x 5cm and will fit anywhere in your home! The collection includes Reef Fish, Penguins, Sea Turtles and Sharks. Or find our Magic Vivarium collection which includes Dinosaurs and Creepy Creatures!