Hmmmmm....
You could do a topic such as "Why snakes/reptiles make great pets"
Or... "How to care for your snake/reptile pet"
Or... "How to identify native species and recognize venomous snakes in our area" (If you live in an area with an interesting diversity of snakes)
Or... "How snakes benefit our environment and why they should not be killed on sight."
I think you'd have to narrow things down a bit more than just "all herps"...but being open to any herp topic certainly gives you a LOT to sift through and choose from. See if you can get your hands on a stack of Reptiles magazines and flip through those for a huge range of animals and topics to consider.
Sounds like a fun project to be working on, however you decide to go!