I think a crab would make a great class pet as long as the first graders can’t get their hands in the tank. A crab would need about the same size tank as the turtle but it would need sand and water and the water would need to be constantly replaced so that it is clean. Next, a crab sleeps for 10-12 hours each day, also it only needs to be in its tank and doesn’t need to come out for any physical activity. Crabs do not need a lot to eat and you only need to feed them once per day. Also, you need to make sure that the children can’t stick their fingers in the tank with the crab because, if they get pinched it will hurt them. Some interesting things about crabs is that they have been around for millions and millions of years and certain species of crabs can grow to be sixteen inches big and forty-two pounds heavy. Finally I think a crab will make a great class pet for being easy to care for and as long as the children can’t get to it, it would make a great class