A Place Called Kindergarten: math.love this as a center for sorting shapes! (Could also make shape mats all white or black so the children are only using the shape without the color cues after they master it with colors)
Looks fun: A, Bee, C, Preschool: Building Shapes. Kindergarten readiness: Colored craft sticks are labeled with the number of sides each shape has, ie: 3 purple sticks - triangle. The children will choose a color and build the matching colored shape from
Fun Kid Activity: Lines of Colored Tape, straws and pompoms. Try straws and cotton balls. Adding the lines ups the challenge. Using pompoms allows you to adjust the size from tiny to pretty big. The pompoms are also nicer looking.
Come Together Kids: Mini Marshmallow Shooters (or Pom Pom Poppers) put a balloon over the top half of a stiff plastic cup, with the bottom of the cup removed. Pull of the balloon tie with the pompom inside, and POP!