ok so for my little brothers birthday my cousin got him one of those kits for a pet. kinda like the frogs thing watching the tadpoles turn into frogs. well this one is different the pets are called Triops. in the picture they look like little horseshoe crabs. and idk how to take care of them other than what the instructions say and all it says is how to set up the tank, and what to do with the eggs and basic stuff like that. plz help me!! and it would help to give some experiences on what to expect.