Things You'll Need
Balloon
Paper mache (mix or strips)
Newspaper
Paint
Brushes
Paper mache is a versatile craft medium that lets you make a hard cast out of any object. It is the perfect tool to use to make a model of the brain because the easily paintable surface lets you clearly label and separate the different sections of the brain. You can make a paper mache brain in a few simple steps.
Step 1
Blow up a large balloon to medium size. Tie off the end of the balloon as far up as possible so the narrowing near the tie is minimal.
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Step 2
Prepare the paper mache. Follow the directions if you bought a pre-mix, or skip this step if you bought pre-coated strips. To make paper mache from scratch, boil five cups of water while mixing in a cup of flour. Boil mixture and stir for 3 minutes.
Step 3
Cut or rip 2 inch thick strips of newspaper and dip individually into the mix. Apply the strips to the balloon until it is covered in a thin layer. Leave a small hole around the tie of the balloon.
Step 4
Wait one hour to let the first layer dry, unless the pre-mixed mache offers a different drying time. Apply several more layers to the balloon, waiting an hour between each layer until the cast is the thickness you desire.
Step 5
Pop the balloon inside of the cast. Divide the brain into the different sections and paint each section a unique color.
Tip
Build up layers of paper mache to look like two separate halves of the brain.
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