jeffrey brown traveled to midland, michigan to find out why for our weekly education segment, making the grade. >> there's a spider in my net! >> brown: hunting for bugs, jumping off logs, dipping for frogs: it's what kids do, right? in fact, no, many don't. certainly not as part of their education. but in the age of testing,'i screens', and, some would say, excessively coddled children, a new movement of 'inature preschools' is growing and pushing kids outdoors. jenn kirts, a biologist by training, oversees educational programs at the non-profit chippewa nature center in midland, michigan: 1,200 acres of woodlands, wetlands, ponds and meadows. >> in a classroom, a lot of the things that you have are static and were designed to be played with in one particular way. the natural environment changes every single day. the weather changes, the humidity, there's scat left behind, there's new footprints, there's leaves that are chewed today that weren't chewed yesterday. and so there's just a natural curiosity that happens there. and it's something that people have spent time in for generat