![TINY TETRAHEDRONS – Geometry, Pattern, Balance](https://static.crayola.ca/uploads/lessonPlans/tiny-tetrahedrons-geometry-pattern-balance/0fd3684321ddf33fd031a5d2b720f270-cover.png)
Supplies:
- Crayola Air-Dry Clay - White
- Crayola Watercolour Paints - 8 Count
- Crayola Variety Brush Set - 5 Count
- Plaster of Paris
- Paper Towels
- Water Containers
- Plastic Containers/Bowls - 1 per student
- Small Plastic Animals and Shells
- Water
Steps:
1
![Step 1](https://static.crayola.ca/uploads/cc319305817a783d8dc2f2681ebd7779-stepSml.png)
- Press some air dry clay into the bottom of the container.
- It should be about 3 cm deep.
2
![Step 2](https://static.crayola.ca/uploads/9c865867ac154e77deb8a317ffab9527-stepSml.png)
- Press 3 or more objects into the clay.
3
![Step 3](https://static.crayola.ca/uploads/1e442f371fbe58e2cea161a51f4e7571-stepSml.png)
- Remove the objects.
- You should see an imprint of the object in the clay.
4
![Step 4](https://static.crayola.ca/uploads/86bea4c6c63eb3f567cfa914650e3391-stepSml.png)
- Follow the package directions to mix about 3 cups of Plaster of Paris.
- 2 parts Plaster of Paris powder to 1 part water
- measure the water in a mixing container
- measure the powder and place it in a separate container
- slowly start to sprinkle the powder over the water
- do not add the powder in one spot
- tap the sides of the container to get rid of air bubbles
- keep adding powder until it seems to sit on top of the water
- slowly stir the mixture until it is smooth and creamy
5
![Step 5](https://static.crayola.ca/uploads/bcadd9b91d3857b811913138ec6f74c8-stepSml.png)
- Gently pour plaster of Paris over the air dry clay.
- It should be about 3.5 cm deep.
- Set the container aside and allow the plaster of Paris to dry for at least 2 days.
6
![Step 6](https://static.crayola.ca/uploads/69d320011ed65518a73b233b87155f71-stepSml.png)
- Gently remove the plaster from the container.
- Brush away any bits of clay.
- Use watercolours or glitter watercolours to paint the fossil.
- Choose contrasting colours so the objects stand out from the background.
Subjects:
Language Arts,
Science,
Visual Arts
Grades:
Grade 3,
Grade 4,
Grade 5