Grass and Egg
I saw a cute idea at school yesterday. A first grade teacher had the children grow grass in a shallow plastic dish - the kind a planted pot sits in. They scooped the dirt, sprinkled the seeds, and then sprayed it with a bottle filled with water. Then, they blew out an egg and dyed it. After the grass grows, the egg sits on the grass and it makes a cute center piece for spring!
If you don't want to wait for the grass to grow, you can cover the dish with clear plastic wrap and secure it with a rubber band to send it home!