That’s what happens when you’re born on Feb. 29, that all elusive date that comes around once every four years. Milestones become garbled math problems divisible by four. “This is great fun” for Myers ...

Sheri-Lynn Skwarchuk receives funding from the Social Sciences and Humanities Research Council. She is also a board member at Oak Street Nursery School and the Project Director of the ToyBox project.

Sorting items by different properties and comparing them is a skill that you can observe the children learning to use with increasing sophistication, as Sheila Ebbutt and Carole Skinner demonstrate.

Thinking back on Halloween, were you a “dump all your candy into one bowl” child? Or did you enjoy meticulously sorting your treats into a post-Halloween candy store and trading with others? If you ...