Science Unit- Life Cycle of tadpoles

A couple weeks ago we started learning about life cycles. Over the summer the kids had shown interest in tadpoles/frogs. While on vacation we were shopping and ended up coming across a frog habitat on clearance. On the box it said it included a coupon for free tadpoles. I opened it today and it is for ONE free tadpole, $8.99 Shipping and handling AND they won't start mailing them until NOVEMBER :( I was disapointed. I looked all over locally and was unable to find them. The time of year isn't exactly the best for them so I ended up finding them online from another supplier. Anyhow, the kids and I have been reading up on how to care for them and how to set up the right kind of habitat over the summer. We will be going to the library tommorow to find anything "froggy." The kids are really excited for this unit!
I haven't decided exactly how we are going to go about it. I am still looking for fun ideas and projects to go along with the unit. I would love input and ideas!!! I plan on reading a lot of books, informational, and some just silly fun ones. As well as a documentation of the life cycle- having the kids write what is happening and drawing pictures. I have also found interesting news stories to read to the kids that pertain to frogs. Today I found one that is about game wardens seizing almost 200 illegal frogs from Nevada. I plan on using this to teach them about ecosystems, invasive species, ect. This is my first attempt at anything like this- I have never been in to bugs, insects, anything SLIMY... The things we do for our kids! Wish me luck!