Oops! It looks like your security settings are blocking this video 🙁
If you are on a school computer or network, ask your tech person to whitelist these URLs:
*.wistia.com, fast.wistia.com, fast.wistia.net, embedwistia-a.akamaihd.net
Sometimes a simple refresh solves this issue. If you need further help, contact us.
Fossils & Extinction Activity for Kids
- 1Large ball of modeling clay
- 1Box of plaster of paris powder
- 1Cup of water
- 1Toy dinosaur
- 1Pair of non-latex gloves
- 1Plastic knife (not sharp)
- 1Cup of cold coffee (optional)
- 1Flatten a large ball of clay into an oval that's about half an inch thick.
- 2Press a toy dinosaur (or any other item) firmly into the clay.
- 3Remove the toy, leaving a clear imprint in the clay.
- 4Use the non-sharp knife to cut away the edges of the clay.
- 5Reuse this clay to build a short wall around the imprint to make a mold.
- 6Ask an adult to mix water with "plaster of paris" powder (follow directions on the package).
- 7Pour plaster into the mold to fill it.
- 8Wait at least 2 hours for the plaster to set (follow directions on the package).
- 9Gently remove the clay.
- 10Optional: brush some cold coffee on the surface to make it look real.
How It Works
Real fossils are covered by sediments (mud or sand) and take thousands or millions of years to form. Some fossils are formed when an animal makes an imprint in the sediment and then other sediments settle into that impression to preserve it. The same thing happens in this activity when the plaster fills and preserves the impression of the dinosaur.
Find More More Activities
Browse All Watch Full Lessons
Choose Your Free Trial Period
Choose your free trial period
no credit card required
Get 30 Days Free
By inviting 4 other teachers to try it too.
Skip, I will use a 3 day free trial
Enjoy your free 30 days trial