Great Color, shape matching for young kids. String, clothes pins...and felt "clothes"...You give a "basket" of laundry to sort, with rules. For younger kids Hang all pants first, for Older children hang the pants first, but in this color order..etc.
Spelling busy bag: this one laminate a card with 3 letter CVC words on them and use die cuts, foam, or magnet letters so preschooler can math up. Be sure to include enough letters to make all the words. Do not recommend magnet letters for children under 5 - risk of ingesting small magnet.