Procedure 

This process is repeated four times for each egg type.

1. Place tray on floor
2. Place 3 lids on the tray in a triangular shape. The lids are 21cm apart.
   
3. Place eggs on the lids with wide end at the bottom.
   
4. Put lids on top of eggs and place pan on top of lids.
   
   
5. Gently place a weight in the middle of the pan.   Wait 5 seconds before adding the next weight.
   
   
6. Record at what weight a cracking sound occurs but keep adding weights until at least one egg breaks.