Hi, there!
Welcome to planDisney, Allison. We're thrilled to see you! I'm super excited to hear that you and your family are about to enjoy a Make-A-Wish trip to the Walt Disney World Resort. How wonderful!
Breaking an arm right before a Disney vacation is not at all magical, but I promise you that there are lots of magical adventures to still be had in the theme parks. Rest assured that there are lots of attractions that your son can enjoy during your stay, but before we get to those specifics, I suggest that you have a chat with your pediatrician about any restrictions on their end. As far as the Walt Disney World Resort, there are no ride restrictions for a Guest in a cast. As long as your son's cast doesn't interfere with the harness or safety bar on an attraction, he's good to go! That said, I recommend checking out the
full list of theme park attractions, particularly the ones that
list any advisories, ahead of your visit. While your son's cast wouldn't interfere with the safety bar on Big Thunder Mountain Railroad, for example, I don't know that he would be very comfortable riding this attraction as you can experience quite a bit of jostling in the ride vehicle. When my oldest son was younger, he had some apprehension about the more
thrilling attractions in the theme parks. We took some time to look at ride videos online before we left for our Disney vacation, and those videos helped him pinpoint his comfort level with riding. This is a good idea for your son too! If he watches a ride video before your arrival and thinks that a particular attraction may be uncomfortable for his arm, you can make a plan ahead of time to skip it, minimizing the disappointment he may feel during your visit.
Another thing you may want to plan ahead for is the heat. Anyone is likely to get uncomfortably warm exploring the theme parks in June, but I imagine your son may be exceptionally so with his arm wrapped in a cast. Fortunately, most attraction queues are air-conditioned, as are most dining locations and entertainment venues, but packing a few cooling towels and a small battery-operated fan may help your kiddo too!
I hope this was helpful, Allison. Please let us know if you have any other questions about your Walt Disney World Resort vacation! We'd love to help you plan a magical stay.
Ashley