The swap for this week's meeting is a Disappearing Nine-Patch Block Lottery
Here is a free tutorial on how to make the blocks.
You can bring as many blocks as you like. You will get one "ticket" per block you bring in, so the more blocks you bring, the more likely you are to win the stack of blocks!
The blocks people being to the meeting should be 7 in squares.
Colors are neutral prints or solids with a contrasting darker solid.
Here are some pictures: