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
Button Sorting Cups (and link to other color sorting games) - What a brilliant idea for your toddler/preschooler! Adding this to our collection of activities to promote fine-motor skills and color recognition!