This is a functioning solar-powered plush calculator. It’s a commercial product, available from, um…oh geez: “Silly Dilly Tot Spot.”
Anyway. I’m interested in the idea that DIYers out there might be making their own functioning soft-circuit calculators, but there aren’t any that I can find. (Opportunity!) I did find one interesting, albeit non-functional, plush calculator from Flickr user caffaknitted, as well as one more commercial version, both of which are shown below.
The title is slightly NSFW. Hint: Turn it upside-down. Or just click here.
Available, in bulk only, here.