4. Mini Dino Excavation Fossils
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| DINO FOSSIL CASTING PROCESS |
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| 1. Plaster + Sand Mixture |
| 2. Embed Plastic Dinosaur |
| 3. Set & Cure in Mold |
| 4. Excavate with Wooden Tools |
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What This Craft Means
Mini Dino Excavation Fossils simulate real-world paleontology. Kids play the role of archaeologists as they use wooden tools to carefully dig mini plastic dinosaurs out of cured plaster blocks.
Materials Required
- Plaster of Paris
- Fine play sand
- Mini plastic dinosaur skeletons
- Silicone muffin molds
- Small wooden chisels & stiff-bristled paintbrushes
Step-by-Step Instructions
- Mix the Matrix: Combine 2 parts Plaster of Paris, 1 part play sand, and 1 part water in a bucket until smooth.
- Embed Dinosaurs: Pour the mixture halfway into silicone molds, place a mini dinosaur in each cavity, and top off with more plaster mixture.
- Set the Blocks: Allow the fossils to cure completely for 24 hours prior to the party.
- Excavate: At the party, hand out safety goggles, wooden chisels, and brushes. Guide the kids as they carefully chip away the casing to reveal their dinosaur.
Pro Tips & Creative Variations
- Hidden Gems: Add small polished river rocks or gold foil flakes inside the block alongside the dinosaur for bonus discoveries.
- Color-Coded Layers: Pour the plaster in two different color layers (using non-toxic powder pigment) to represent distinct geological strata.
Mistakes to Avoid
Avoid pouring leftover wet plaster down residential sinks, as it solidifies and clogs plumbing. Do not use metal chisels or hammers, which can break the mini plastic figures inside and create sharp edges.