"le gosse fait pipi dans le bac à sable," for example

A member of one of the listservs I subscribe to just directed us to this website with a comprehensive list of expressions in French that have to do with babies and toddlers, everything from "un parc" (playpen) to "un sac kangarou" (a sling to carry the baby in) to "un lapinou" (bunny). I learned a lot from this list (but am also reassured to see that the words I've been using with Carl are generally correct--I just didn't have the breadth of vocab that this list offers).