For assembling, use a large, flat space. Do not open wonton wrappers all at once, but as you need them; similar to phyllo dough, they are very thin and dry quickly. The freshest wrappers at the store will appear moist and may have slight condensation inside the packaging. Mondu can be transferred from your workspace to wax paper. After 30 minutes, they will be dry enough to store in containers to freeze, with wax paper separating the layers. If steaming, the wrappers will become slightly translucent when ready to serve. Estimate 3 to 4 dumplings per person for appetizers or 10 per person for a meal. Children as young as 8 can help with the assembly.