Hoosier Mysteries Are Happening!!!

Dear Ron,
We have enjoyed your mysteries very much. We are learning lots about where you live. Now it is your turn to learn about us. Here is a mystery for you...
This was found across the street from the middle school. It is part of a living fossil. It takes 15-20 years for the parent to produce "offspring." While most of us have seen these, usually in the park, we didn't all know its name.
Have fun with our mystery!
Your friends in Mrs. N's class