Alphabet Letters as Art: each letter is on an individual colorful canvas; each created in a class project and as unique as the individual that created it. This is really a great idea for learning and creative in a team effort.
Make a backyard bowling alley. Add food coloring to clear plastic bottles of water. Use party streamers as lane margins. Add glow sticks for night bowling. (These would make great outdoor table nightlights also with the glowsticks, gonna try it!