Crayfish babies?

We have finished our structures of life science unit, but we continue to observe the organisms in our classroom. Our crayfish have fertilized eggs.

Now we have a female crayfish with eggs on her tail. We are hoping to see some young crayfish in 2-3 weeks. The young crayfish will stay on the tail of the female. They are called instars. They will outgrow their exoskeletons and then leave the mother's tail.