This was a top tip from my favorite website of the moment ABCdoes blog which I thought I would share with you, you can follow the blog http://www.abcdoes.typepad.com/
If you have snow tomorrow try putting paint/water solution into old ready mix paint bottles and doing some pattern making or letter formation. Also if you put the solution into a plant spray bottle or similar you get a great effect when you spray it onto the white snow.
Best wishes and happy experimenting Kirsteen
