March 15th is a Sunday, May 15th is a Friday- mail by date should be May 9th (sat) or Mail 11th (Mon). You may want to start small- choose no more than 2-3 topics (like we did with the altered binder clip swap) and we could always. This will give you less to deal with in both sign-ups and sorting. We can always add another ATC swap later in the year. I would suggest maybe Disney characters- let everyone choose their favorites and then 1 or 2 areas - maybe holidays and something you like best - animals, seasons, ect. as your third topic.
Rebecca