Touch Sensitive Tiles

I found these tiles today which respond to temperature and change colour.
I would like to use them in my project for the tables in the informal meeting areas and social areas.
They will create a talking point and fun activity.
http://www.movingcolor.net/products_touch_sensitive.html

Also just out of interest watch the gif on this page showing similar tiles being used in a shower! http://www.movingcolor.net/products_northern.html