Things that make you go "Hmmm"

The paper clip is an incredibly simple thing which performs a highly useful function. Without those little twists of metal, papers would run amok throughout classrooms and offices everywhere. They're a tiny solution winning big in the battle against disarray. As such, I didn't hesitate to use paper clips in my class to keep the students' work together. Once they'd completed their assignment, they were each given a paper clip and asked to attach the papers to the inside cover of their books so as not to loose them. Wouldn't you know that these kids didn't know how to 'operate' a paper clip?What with their no moving parts and simple design, I'd always assumed that anyone could use a paper clip; turns out 7 years old is just before the paper clip 'coming of age'. Some of the kids could figure it out, but others just held up the clips saying, "Teacher, what?" Who knew there's an age requirement for paper clips!