Helium filled balloons tied to weights in pool. If you want to create the illusion of floating balloons use fishing line which is virtually invisible. (IDEA- Could also ADD some glow sticks so that the balloons GLOW over the Pool at NIGHT!
Take the legs off of plain plastic pool chairs and paint them bright, summery colors. Place next to your pool and enjoy dangling your feet in the water on a hot day. *cute ideas - chairs, noodle use, and hooks