Wording of this Handout:
This is a sea urchin. It is called the Hat Pin Sea Urchin because it has long spines which look like hat pins. ladies used to poke pins like this through their hats and hair, to keep the hats on.
The sea urchin moves very slowly, like a snail, and it can't clean itself, but God has created two little fish to help.
The two fish are called the Shrimp fish and the Cling fish.
The fish keep the spines of the sea urchin clean, and the sea urchin's spines protect the fish from other fish which might want to eat them.
And one more surprising thing: the Shrimp fish and the Cling fish are both very narrow, and they know how to swim head down. This makes it easier for them to swim among the spines.
God is a great designer. He makes many things which work together, helping each other.