Hard boiled egg: curl into a ball on the floor.
Soft boiled egg: lay flat on the floor on tummy.
Fried egg: lay on back, wiggle hands and feet in the air.
Here's a picture of "Fried Eggs", which was many students' favorite part of the game:
This game, and others like it, include many important PE concepts and skills: locomotor skills, personal space, space awareness (staying in "the box", boundary line around the edge of the gym), following directions, and listening skills. For lower elementary students, all of these skills are the main focus of our first several PE classes, and are emphasized throughout the year.