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Just for fun, really simple games that might get a smile.
Whimsical, very simple games - match, catch the microbe, word guessing and spelling, dot-to-dot (you set the dots, the macrophage connects them), maze. The content is microbes and the immune system, and the scientists who built our understanding of our immune system.
Serendipitous learning might happen.
Macrophage art by Leith Walton.