Saw these style boards on Oriental Trading for use as geometry boards. Wondered a diy hack. Use glue on bottom circle of thumbtack to secure it from being plucked out by little fingers. Sowdering About in Seattle: Toddler Busy Boxes
Muffin Pan Fun and other toddler activities months old ---> O'Courter: When he was around 9 months old, I gave my son plastic Easter eggs and a mini muffin tin. He had a lot of fun sorting them in the tin.