Unique ideas for a jungle themed birthday party?

I want to have a jungle themed birthday party for my son's second birthday. I don't want to spend a lot but I still want some cute photo opportunities. I was hoping for help with food to serve and what, if anything I should ask my guests to sign. I was thinking they could sign an oversized pport, safari hat, or a shirt for my son to have. Last year we did the ceramic plate and it came out so beautiful and I was hoping for something similar to this. Also, if you have any other ideas to make the party a success, please let me know. Any help is greatly appreciated. Thank you.