Hi Viola,
I absolutely love to hear from first time visitors to WDW. It's so exciting to help a first journey to Walt Disney World.
Visitors to the WDW parks may bring in outside food, snacks, and beverages. There are a few
limitations, for example, no glass containers, alcoholic beverages and coolers can not be larger than 24"by15"by18".
There are not specific picnic facilities set aside, however, you'll find many pleasant spots for a picnic meal. In the Magic Kingdom, try the outdoor seating in front of the Plaza Restaurant with a great view of Cinderella's Castle!
Enjoy a wonderful visit and a pleasant picnic at Disney!