If you (or someone in your family) wear Crocs, you can donate your old worn-out pairs through the Crocs SolesUnited program and they will be recycled and donated to those in need around the globe!
You can also buy SolesUnlimited beach and kids' cayman Crocs at retail locations; here's the difference:
"SolesUnitedTM CrocsTM shoes are made from the same recycled proprietary Croslite™material as the donated shoes, yet these shoes are sold exclusively at select retail outlets and at www.crocs.com. These shoes are unique in that not only are they constructed out of a portion of recycled material, but for each pair of SolesUnitedTM recycled shoes purchased, Crocs, Inc. will match the purchase by donating a pair of recycled donated shoes through the SolesUnitedSM program to an individual living in an impoverished area of the world. Additionally, the recycled donated shoes are not available at retail."