Stacking boxes is one of the earliest forms of geometry. Yep, playing with boxes is geometry for toddlers!
Stacking boxes is not only beneficial because it develops hand-eye coordination or social skills, but it is also beneficial because during box stacking toddlers begin to think like mathematicians. Specifically, they learn the most basic concepts in geometry and gravity.

Fine motor skills are the small, fine tuned movements we use to participate in more complex activities like writing, using silverware, and stacking blocks. Your child's ability to interact in box play shows off these relatively new fine motor skills.