frogs By KPowers

I've also used lily pads on my classroom door and said "Welcome to Our Pad!"

Some of the books I read are:

Green Wilma by Tedd Arnold
Frogs by Gail Gibbons
Frog and Toad Together by Arnold Lobel
Frog and Toad All Year by " "
Frog and Toad Are Friends by " "

Mailbox has a resource book about reptiles and amphibians. I've also gotten ideas from the internet and a company called the Pocketbook (Livermore, CA).
This a great theme and my kids always love it!