Love this idea! Except I'm afraid I might get the same book then I couldn't take one back because it would have a message. So maybe I could buy the books and the guests pick a book to write a message in.
This tornado in a jar experiment is crazy simple, but it's SO COOL to watch! It takes less than five minutes to put together. Easiest science lesson ever! If you don't have a jar you can use a clear plastic bottle Have fun 😁