Let it snow
Back before Christmas i got some fake snow for Seb to play with. What with one thing and another, i only got around to using it last week but it was worth the wait.
The snow came as a powder which you add water too and it expands and turns into snow. I was suprised at just how snow like it was to look at and to touch. I made it up with ice cold water to make it even more realistic to touch.
As usual i popped the snow into his sand/water table. I also put some snow shovels(spades) in, a couple of snowball decorations and a polar bear in.
We threw the snow away after a couple of days though, apparantly it can last upto a month if you store it in a sealed bag and spray with water.
I really hope we get some real snow this year to play in, but if not this is a good alternative.