The Sea-Monkeys Magic Castle brings the classic “instant pet” into a tiny fantasy world. This castle themed aquarium has a built in magnifier so you can watch your Sea-Monkeys drift, dart, and explore their new royal home up close. It feels part science experiment, part tiny realm in a tank.

Inside the kit you’ll find everything you need to get started: water purifier, instant live eggs, Sea-Monkeys food, a feeding spoon, air pump, and full instructions. Kids mix the packets, wait for their new pets to appear, then feed and aerate the water to help them thrive. It’s a simple, low mess way to introduce basic care, patience, and a bit of “are we sure this isn’t magic?” to the day.

Recommended for ages 6 and up.