Développement social des enfants de trois et quatre ans - Broché

The chapter on side-by-side play versus cooperative play finally made sense of why my three-year-old hands blocks to her friend without actually building with her yet. It's a thin paperback, but the examples are concrete enough that I've already changed how I set up playdates.

I picked this up while my four-year-old was going through a phase of snatching toys from her little friends, and the section on rolling-down-hills play genuinely changed how I set up her afternoons. The writing is plain and practical, not academic, so I actually finished it in a couple of evenings.

The chapter on block-building together versus rolling down hills really clicked for me—I finally get why my daughter narrates every move when she's playing with friends. It's a thin paperback, but the examples are so specific I've already reread the doll-play section twice.