Sodium bicarbonate (aka Baking Soda, Bicarbonate of Soda)
White hair conditioner
Mix in a bowl 3-parts Sodium bicarbonate to 1/2-part white hair conditioner.
(I used 3-cups of Sodium bicarbonate and 1/2-cup of white hair conditioner.)
Keep mixing until you get the consistency and feel of snow.
If too dry add a little bit of white hair conditioner. If too wet add a little bit more sodium bicarbonate.
Once happy, pour onto a tray and play!