DH and I were having dinner out last night, discussing what to do about DD's preschool. I relayed a story about DD describing her reasons for being naughty and how that might affect me, and DH said, "She's into concrete operations." Maybe this is the thing I've been struggling to identify in her.

Does anyone have any good understanding of concrete operational thinking in preschoolers? I've been poking around, but thought I'd ask here.