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.
Spring chalk art: Have students work together in groups: brainstorm and sketch inside, then use a class period to draw w/ chalk on blacktop, then pose together laying on blacktop. I stand on a ladder and take their pictures!