Here's how it works (or at least how the one we went to on Saturday worked):
1. You pre-register for $20 or you pay $25 at the door, and you have to bring at least 5 items to donate (children's or maternity clothes, books, and/or toys).
2. You get to the event (doors opened at 10am), sign in, give the items you're donating to a staff member, and are handed one ticket and a huge tote bag which you will fill up during the swap (only get stuff for your kids now - no hoarding for their whole childhood!!). You print your name on the ticket and peruse the table of various raffle prizes, putting your ticket in the box for the prize you want. They had really great prizes from a ton of vendors (see photo below). It was a hard decision, but I put my ticket in the Kidz Central Station box for 1 month free Gymboree classes (P.S. I actually won!!!).