Making paper mache' is so much fun. For my little art class, I prepared stuff ahead of time like separating egg cartons and cutting strips of newspapers.
We blew up balloons and tied them. The children wanted certain colored balloons, but I had to explain that the color of the balloon wouldn't matter later because it wouldn't be seen. They still persisted and we tried the best to give them their color they wanted. We used masking tape. Do not pull the masking tape off to readjust a leg or snout. Our helper did this and two balloons were popped. :)
We taped four egg carton pieces to make legs and taped one over the tied end to make a snout. Then I mixed flour and water into a thin paste. The children then ran a strip of paper through the glue and put them on the balloon. There were at least six to seven children in there when we were doing this. It got very messy. I had them cover every inch of egg carton, tape, and balloon up.
By the time the children were half way done, they got tired of being messy and went to clean up. I finished the rest for them. Tomorrow we will be painting the piggies and making eyes for them.