kestrell | PIAF machine

I just heard about one of these machines. It is not, as I had hoped when first hearing of it, a piece of voice equipment which allows you to sing sad songs in French, but instead is a sort of embosser which uses special paper to make tactile images
http://www.humanware.com/en-usa/products/blindness/braille_embossers_and_writers/_details/id_147/piaf_picture_in_a_flash_tactile_graphic_maker.html

This reminds me that I still haven't tried puff paint--does anyone have a brand which they would recommend?