Sand Casted Starfish
By: Amanda Formaro
Age: 5 and up
Whether it's a sand dollar or some other creative design you think up, sand casting is lots of fun. Be sure to read our cleanup tips at the end!
What you'll need:
- Plaster of Paris
- 5 3"-long twigs
- Assorted shells
- Stiff bristled paintbrushes
- 4 cup measuring cup
How to make it:
- This project can be made at the beach right there in the sand or in a large bowl filled with moist sand. If sand is dry, mist it with a spray bottle, or sprinkle it with handfuls of water. Get the sand evenly moist by spreading and mixing with your hands. Form a 6-inch diameter circle, about 2-inches deep; this will be your mold. Smooth the floor of the mold with your hand and pat it down gently.
- Place the twigs into the circle, pressing down firmly, but gently, forming a star shape. You do not want any plaster to seep underneath them. (See photo.)
- Arrange the sea shells face down in the sand, pressing in firmly, but gently. (See photo.)
- Mix 3 cups of plaster with 1 1/2 cups of water in 4-cup measuring cup. Stir mixture well until creamy; be sure to remove all lumps. Slowly pour the plaster mixture into the sand mold. You do not want to pour it too quickly or you may disturb the placement of your objects. (See photo.) (Read the tips at the end of these instructions for disposal of your remaining plaster.)
- Allow plaster to dry for at least an hour to let it harden.
- Carefully dig around the edges of your mold with the spoon and gently loosen and lift the plaster cast.
- Let the sand casting dry for another hour. Use stiff bristled paintbrushes to remove the excess sand. (See photo.)
- If you will be making this project at the beach or at a lake or pond, please be sure to bring along a roll of paper towels and a couple of small trash bags (plastic grocery bags are ideal). Do not wash out the bucket or bowl you mixed the plaster in by sticking it in the lake or ocean water! Instead, wipe out as much of the plaster as you can with paper towels and dispose of them in the small trash bags.
- Use whatever you have available to you, such as sticks, pebbles, shells, and stones.
- If making this project at home, do not rinse plaster of Paris down your sink drain. Instead, wipe as much out of the bowl as you can with paper towels and throw away.