Taking things apart is a wonderful way to explore structure. The ability and inclination to look carefully for structure is key to engaging meaningfully with mathematics and science.
Invite your child to take something apart ... what did they learn from taking it apart? Could they put it back together? Could they use the pieces to make something different? Could they make the thing (or something like it) with other materials?
We have a lot of boxes (from crackers, pasta, and other food items) lying around the house these days. Take one apart carefully. Can you fold it into something different? Can unfolding the box help you think about how to make a box of your own?