A friend sent this "50 PALINDROMES" sheet to me last week, and it is terrific. (If you have trouble viewing this on your computer, try clicking on this link).
I could have used it when I was teaching my 5th grade math class about palindromes . . . 40 years ago. Also, this 40-year old experience has been captured in my book Forward backwards THE SAME.
Also, the book SO MANY DYNAMOS! by John Agee is a very popular and amusing book.