Another hair trick: How to do beachy waves in less than 5 minutes: Divide your hair into two parts. Twist each section and tie with a hair tie. Run your straighter/flat iron over both of the twist a few times. Untie twists, and you're done.
DIY galaxy shirt- splash/spray with bleach, tie-dye red, bleach again, paint/sponge on red/blue dye/paint and finish with white fabric paint stars flicked on. would also be a nice technique for a table cloth or throw pillows.