
Coco Color – A coloring stylus for kids - hughnjbell
http://cococolor.com
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psychogenic
Not sure what I think of a tablet "coloring book" but the tech is
intriguing...

According to

[https://cococolor.com/pages/instruction#best-
results](https://cococolor.com/pages/instruction#best-results)

it seems the apps just listen in on the mic and the stylus emits some sort of
(ultra?) sound/sequence of audio pulses for each of the 4 buttons.

Anyone know if that's correct? If so, I wonder what the frequency is... are
all Android devices responsive to these sub/ultra sonics?

