Play-Doh Heart Mold
thingiverse
This is a mold to make a play-doh heart model. I have not tried it, but I expect it takes ~4 containers of play-doh, so scaling it by 80% in each linear axis should reduce that to about 2 containers. This Mold can be used to teach kids about their hearts in a medical setting.
Download Model from thingiverse
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