It was a brilliant idea the first time around in the spring when Target let parents trade in their old car seats for a discount on a new one. When little ones are growing like weeds, it honestly killed two birds with one stone. Not only do parents save money, but they also get to offload a bulky car seat that would probably take up precious storage space for way too long. All while actually doing something good for the environment — no wonder the idea went over like gangbusters. Parents loved Target's car seat trade-in program so much last spring that now the program is making another limited time appearance.