Bar Mitzvah Help

Ok my brother is having a bar mitzvah in a couple months from now. We know it is nature themed so far. Its not girly nature like flowers, its like rainforests and trees and rivers n stuff like that. We arent sure what we are going to do for the tables but we dont want it to be things such as the rainforest table or the crocodile table. If anyone has any ideas on an original idea for the nature themed tables or anything we could put in the room to make it look cooler than help me