I used to volunteer and then worked for a time for the Point Defiance Zoo & Aquarium in the volunteer department. Every year they have a volunteer party to say thank you to all the great people that come together to help out the zoo.
This year I was asked to make a special coloring sheet of zoo animals (I tried to include as many of the zoo animals as I could squeeze in) which was then blown up and the volunteers were given small pieces of the bigger piece to color in. When they were done, they posted the images back together to make the completed, colored in sheet. Fun! I would love to do more work like this. Although drawing animals never seems like work for me.