Well the rain goes on and on, and I have to make my own fun. Try this: "Wafer Biscuit Jenga". The rules are the same as Jenga, players take turns, using only one hand to remove a single wafer from the stack without causing the stack to fall. The top two rows must be left untouched.
If they successfully remove a wafer, they add it to their pile ready to eat. The person who topples the tower, hands back their pile of wafers and does not get to eat them. Everyone else can then eat from their winning piles.
I used different flavoured wafers, the popular cocoa wafer lower down, the unpopular strawberry wafer at the top. Rainy days don't need to be dull.