Create an oasis with ideas for colorful balloon arches, palm trees and more! Celebrate summer with these hot ideas for a splashy pool party. Time to chillax with friends and family, soak up the sun and goof off in the pool. Swim on through this gallery and steal our top party planner tricks for creating a colorful backyard oasis. We're loving the breezy DIY balloon palm trees, cool blue tablescape ideas and tropical wearables like beachy hats and leis to get everyone chatting and having a blast. Piña coladas, anyone?