Pin the Sperm on the Egg
Materials: Draw and then cut out an egg shape (try to take up the majority of a normal-sized, 8.5×11 sheet of paper). Draw and then cut out several same-sized (2×4 inches) sperm (don’t worry about your drawing skills, it will be fun either way!). You'll also need tape and blindfolds.
How to play: Tape the egg on the wall, put a piece of tape on the back of each sperm and pass them out to guests along with a blindfold. Play just like Pin the Tail on the Donkey. The guest to pin the sperm closest to the middle of the egg wins a small prize!