The kids have already started school, and the next major shopping holiday on your radar is, probably, Black Friday. But there's still time to focus on other worthy shopping goals — like rethinking your child's knapsack. Everything a kid touches has a short life span, so it makes sense here, more so than in any other area of your life, to focus on being eco-friendly. Green Dad Lou Carlozo has six tips to bring savings and the environment together under one schoolhouse roof.