It's no secret that babies and young children can quickly outgrow their clothing and toys, usually way before these items are worn out. Take advantage of this by hosting a baby and kids' resale for your next fundraising event.
To do this you'll need a fairly large venue that includes a cafeteria or a gymnasium (a school or a church will work fine). Long tables are usually required and if you can get hold of clothing racks this would be a big help.
Decide on a day for your fundraiser — you can maximize the number of shoppers you get by choosing a Saturday or a Sunday. Rent out tables to parents looking to sell clothes, toys and other accessories that aren't needed any more (maybe for $10-20 each). You can also charge an entry fee of around a dollar to shoppers who are just browsing.
For large items (such as high chairs and strollers) set aside a monitored room and make sure each item is marked so you're able to distribute the money accordingly afterwards. It's also a good idea to have a concession stand offering food and drink for shoppers and moms. Get everything right and it'll be an event that everyone looks forward to each year.
You can find more information on holding a clothing consignment fundraiser here.