Saturday, August 02, 2008

Crazy Science Part 2:

Sand Clay Volcano

Recipe for the clay:

1 cup sifted beach sand
1/2 tsp alum
About 1/4 cup corn starch
1 cup water

Combine ingredients in an old, saucepan. Stir constantly over medium heat. When clay starts to stiffen and hold its shape a bit, remove from heat. Turn onto foil until it is cool enough to work with. It cools pretty fast. We molded the clay into a volcano shape placing a toilet paper roll in the center.

Next step takes a while. Let dry in the sun 4-8 hours! Zoe was too impatient to wait for it to dry so we decided to just forge ahead..........

Lava Ingredients
1 cup baking soda
1 paper cup
4 drops red food coloring
3/4 cup vinegar

Pour the baking soda into the toilet paper roll. Add the food coloring on top of the baking soda. Poke a pencil through the bottom of the cup. Place a paper cup upside down over the (empty) toilet paper roll. Voila! Your volcano.

To make erupt pour the vinegar into the hole in the paper cup. We used a turkey baster.

Let's do it again mama even bigger!

1 comment:

.girl ferment. said...

That looks like so much fun.