I put a boiled egg into vinegar for several weeks, we can take it out each day and feel it. After a few weeks it loses the calcium that makes it hard and brittle, it becomes soft and leathery like a real dinosaur egg might have felt.
To make a “real” life dinosaur fossil, put a small amount of clay on the bottom of a paper cup. Push a small plastic dinosaur into the clay to leave an imprint. Remove the dinosaur. Pour in Plaster of Paris to fill the rest of the cup. Wait a day then peel off the paper cup. You will have a great “fossil” in the plaster! You can paint the dinosaurs and have fun!
Dino Fossils – In individual foil muffin cups, fill half way with damp sand. Let children choose which small plastic dino shape to press into the wet sand. Remove plastic dino and pour in plaster of paris. Let harden, turn upside down to unearth. Give children toothbrushes to use as a tool to clean the fossil and pretend they are archeologists.
When discussing dino’s or fossils with your Preschooler’s, you can try taking a rectangular baking pan or 2 and filling it half way with water and small plastic insects/bugs and freezing it. Later, when that half is completely frozen, fill to the top with more water and insects and let it freeze. The next day, take the ice and insect mixture out of the pan and into the texture table. Give kids metal spoons to dig for the “fossils”. I recommend limiting the # of kids to 3, for safety. The children came up with some other good ways to dig the “fossils” out also, like warm water over the top of the ice.
For our dinosaur unit we added lots of plastic dinosaurs and cave people to the sand table. The kids loved playing in it together acting out the times of the dinosaurs. One day we also put in the “bones” of a dinosaur I found at the dollar store, when they were all found we put the “bones” together to make a glow in the dark T-rex! They loved it, they keep asking when we can talk about dinosaurs again!!
Dinosaur bone. Spread out newspaper (I overlapped four sheets then added about another 20) then roll it up..add more sheet if you want it thicker. Then I made the ends look ‘bony’ by rolling another few sheets, folding in half and tucking fold into the end of long wad. When satisfied with shape, I then wrapped the lot in plaster bandage (acquired from a Doctor Dad!) and kept wrapping it until well covered. Next I covered it all with plaster of paris and left to dry. End result….a huge leg bone. Did all this when the children were not in attendance and kept it hidden until it was dry …..and planted it in the sandpit with only a tiny tip sticking out. Our archaeologists had a great find and loads of language was used as they discussed which dinosaur, how it got there, what part of the dinosaur etc. etc.