Kids are natural builders and inventors. That's how rich their imaginations are. And that's how they learn construction and possibilities. But have you ever tried doing the reverse?
Their imaginations are put to work through the ultimate euphoria of discovery.... one revelation after another.
What --nobody said anything about putting all the pieces back together, right? One lesson at a time, come on.
ps. It goes without saying (but I will anyway), parental supervision during dismantling is required and thorough hand-washing immediately after.