THRED UP
Thred Up is a community of moms, helping moms. You send in your box of unwanted childrens’ clothes, toys or books. and then select from another prepackaged box, based on the sizes and kinds of items you need. Thred Up is like an online consignment store, offering you up to $10 for each box you send, and the replacement box costs only $9.00.
Think Outside The Bin
Think Outside The Bin 
Love this idea. My Organizing Clients/Fans will love this. It gives them another motivation to get rid of unused/unwanted kid’s stuff. Thanks for sharing. I will pass on the link. =)