Your dolls can stay inside and still have snow in the comfort of their home with this craft. you will need Styrofoam and jar or something to keep the "snow" in.
Step one: break up a piece of Styrofoam.
Step two: put in in the cup or jar.
You are done. But be prepared to clean up as this is a messy craft. Also if you want to make an even more snowy scene use a white sheet and put it on the ground. Hope your dolls have fun day in the snow.