Cut the end of a toilet paper roll into strips and fan the strips out.  Dip the stripped end into paint.  Now, stamp the paint-dipped end of the toilet paper roll onto a piece of paper to get a firework explosion effect.  Stamp over and over with multiple colors to make your painting look like a big fireworks finale!

A shape puzzle is a good way to teach smaller kids their shapes.  A flag puzzle lends itself to teaching shapes.  You have rectangles, a square, and stars!  Plus, you have two different lengths of rectangles.  Cut out the different shapes and let the kids go to town piecing them together into the design of the flag.

Cut out a star (red or blue).  Put a face on it.  Then, cut some white strips and fold them to make "springy" arms and legs, gluing them to the star.  Cut out smaller stars as the hands and feet, using whichever color you didn't use for the face.  Glue those to the ends of your legs and arms.

Cut out multiple kid-traced hands in red, white, and blue.  Paste them together in a spiral circle.  Cover them in glitter.  Bam! You now have hand print fireworks.

Cut out a rectangular piece of white paper.  Use a pompom dipped in red paint to dab out your red stripes for the flag.  Dip a 2nd pompom in blue, using it to make the blue square section.  As you're dabbing out the blue section, be sure to leave spots of white open to serve as your stars.