How to Make Dinosaur Eggs

It's fun to make your own dinosaur eggs at home. You could display them or bury them and encourage children to look for them in their own backyard.

Preparing the Plaster of Paris

1. Mix the plaster of Paris until it has the consistency of a thin milkshake.
   
   
2. Pour the mixed plaster of Paris into the squirt bottle. Put the lid on it.
   
   

Molding the Dinosaur Eggs

1. Put the balloon over the end of the squirt bottle. Squirt the plaster of Paris solution into the balloon.
   
   
2. Wipe off any excess plaster from the exterior of the balloon. Blow a little air into the balloon. Don't blow too much�¢??�¢??if you put too much air in, the egg will crumble.
   
   
   • If you don't want to put your mouth on it, just move the bottle straight up and down and put some air into the balloon that way.
     
     
3. Tie the balloon up. Once tied, float it in a tub of water.
   
   
4. Roll the balloon around and around until it becomes heavy on one side. Once it feels heavy on one side, let it float in the water for about 15 minutes. (You can use this time to make some more.)
   
   

Removing the Balloon Mold

1. Remove the balloon egg and carefully cut away the balloon. Be warned that this part is very time consuming.�?� 
   
   
   • Start at the top and carefully pull up the neck; this gives you a little room to cut away the balloon without damaging the egg.
2. If you have removed the balloon carefully, you'll have a hollow egg just like the ones on Jurassic Park. After 24 hours, the egg will be solid enough for you to paint it.
   
   

• Plaster of Paris
• Balloons (large water balloons will work fine)
• A tub of water
• A pitcher (to mix the plaster in)
• A stirring spoon or stick
• A ketchup or mustard type squirt bottle