Characteristics of shapes work well with seasonal activities. It has to be decorated symmetrically, with corresponding decorations on each side of the line. We do symmetrical string painting by folding paper over a painted string, then pulling the string out with the paper held shut. This creates a symmetrical design with which students can make a card. They then have to draw the other half to be symmetrical to the first.
Students also draw in the line of symmetry.
A Cheez-It cracker is exactly one square inch. These are great manipulatives to use in teaching these skills. Students use these to color their individual paper squares on paper. The class finds the area and perimeter of the quilt. We do this activity often to complement several themes.