One of my biggest tips for Disney World and Universal Orlando guests (or any other Orlando theme park) is to be prepared for rain! Florida is notorious for rain showers, so be prepared! You can purchase them for about $10 each in the theme parks but I save money by buying a whole bunch of rain ponchos from Amazon and carry them with me. Most rain showers are over pretty quickly, so when rain comes, we put on our ponchos, grab a little snack (Dole Whip!!) and wait it out! A lot of people flee the parks when the rain starts so coming prepared is a great way to take advantage of the shorter lines during rain showers. No need to let a little rain ruin your day!!!
You can also find inexpensive, disposable rain ponchos at most Dollar stores and in the camping section at Walmart. My local Dollar Tree had them in the section where hair accessories are sold. The fashion maven in your family may declare that they would NEVER wear a poncho will probably change their mind when they see lots of people putting them on when the rain starts.
Even if it isn't raining, you may want ponchos to help keep you dry on attractions that can soak you to the skin like Splash Mountain in the Magic Kingdom, Kali River Rapids at Disney's Animal Kingdom or Dudley Do-Rights Ripsaw Falls and Popeye & Bluto's Bilge-Rat Barges in Universal's Islands of Adventure.
Have a magical day! Monica, Travel Agent specializing in Orlando theme park vacations: http://www.buildabettermousetrip.com/monica-bryant-bio/