Anyone have good Christmas exchange ideas?

[The Backlash Cometh]

I'm specifically looking for the rules to the Christmas exchange where you go in order and the first person picks a wrapped gift, opens it for everyone to see; then the second person selects a wrapped gift under the tree, opens it for everyone to see; then the first person can decide to keep their original gift or trade it for whatever the second person got. It goes like this until everyone gets a gift, but I do believe that it ends when the first person gets the final choice to trade again?

I'm not clear on the rules, so if anyone has played this Christmas gift exchange, I'd appreciate it if you'd share it with us.

Oh! I almost forgot. What makes a good generic gift for under $25.00?