We have been experimenting with shaving cream and liquid watercolors lately.  The resulting images are truly fantastic, but what's even more exciting about this is the sensory play and color mixing involved in the process.  The kids get lost in it, and it seems to fully captivate their attention.  They are begging for it every day and asking to make more, more, more! I have made 10-12 of my own prints and I plan to make cards with them when I'm done exploring and ready to move on up to card stock.  I'm curious to try the technique with fabric dye and fabrics.

-KK