Look at your rock carefully. You should see two stripes where you sprinkled the baby powder. Tap the screwdriver gently on the stripes. The plaster should fall away, revealing the eggshells. Carefully brush away the baby powder with the paintbrush.
Paleontologists have to be extremely careful when digging up fossils.
Like these eggshells, real fossilized eggs are very fragile. Experiment making a sturdier fossil using a clean chicken bone. Thank you for visiting the Public Museum of Grand Rapids. Voigt House Victorian Museum - 115 College Ave.