Ingredients:
—25 g corn starch
—125g sand
—22.5 ml water
Method:
—Mix the cornstarch and sand well
—Add water (mixture will be dry and form small clumps)
—Press mixture into a (microwave safe!) mold (for example, balloons were used for the rounded shapes)
—Microwave mixture for 3-5 minutes
—Allow mixture to cool, and then remove from mold
—This creates a very hard, concrete-like material
Experiment with: sand coarseness, alternative composite materials and dyes (keeping the ratios of cornstarch:water aggregate the same). The larger brown sphere was made with cornstarch and cork granules – it’s a solid, but very light form.
https://naturelab.risd.edu/discover/biomaterials-you-can-make-at-home
