You will need:
Cut up some pieces of tissue paper. I like to use all different colors but if you were studying a particular color it would be pretty to have different shades of that color.
Next, peel off the backing on some contact paper and tape it to a wall or window. This is always tricky for me and I usually end up with the contact paper all stuck together. So after you untangle it and you little one gets their hands on it, it will look something like this. you can apply a tray of tissue paper and demonstrate how to stick it on.