While they’re the favorite footwear choice for many, flip flops are not known for their lasting power. I’ve worn down many a pair to thin strips of rubber I could feel every pebble through and then—if reluctantly—threw them away, knowing of no more earth-friendly way to put them to use when they were no longer wearable.  That changed this spring. If your flips have gone a little floppy, stop before you feed them to the trash bin. Your tattered, dirty old flip flops could provide endless entertainment for American youngsters. No, really.  Old Navy has partnered with New Jersey-based national innovative recycling organization TerraCycle to turn used flip flops into playground equipment, with a program dubbed Flip Flop Replay. If the name TerraCycle sounds strangely familiar, the organization was coincidentally referenced in the last Eco-Friendly article on Highlands Elementary’s green efforts. A nationwide effort, the program goes like this: used flip flops are collected in large boxes at Old Navy stores across the continental U.S.; the boxes are then mailed to TerraCycle; TerraCycle turns the flip flops into playgrounds, like eco-magic. When finished, the playgrounds will be donated to schools or communities throughout the country who participate in TerraCycle programs.