Sounds like fun to me!
Start by putting a clean bowl outside when it is supposed to snow. We did that last night. Then we went looking for recipes. The two with the most ratings were at :Allrecipes and Paula Dean.
We went with the Paula Dean recipe because we have had a lonely can of sweetened condensed milk kicking around the pantry for a few months now. I have no idea what we would have bought it for. I think I probably asked for evaporated milk for pumpkin pie and the farmer brought home condensed. We probably had a conversation that went like this:
Me: "You bought the wrong kind of milk."
Him: "You asked for milk in a can. That's what I got. What's the problem?"
Anyway, we used the milk. It worked, but it was waaaaaay too sweet. The easy bake oven cakes that we made to go with it were good though.