No, you cannot take a WonderFold or any other brand of stroller wagon into the Disney theme parks in 2026. According to the official Disney World and Disneyland property rules, all wagons and stroller wagons—whether they are pushed or pulled—are strictly prohibited inside the parks. Additionally, standard strollers must be no larger than 31 inches (79 cm) wide and 52 inches (132 cm) long. Most WonderFold models, such as the W4, exceed these dimensions and are classified as stroller wagons regardless of their size. There is a very narrow exception for guests with disabilities who have a medical "Stroller as Wheelchair" tag, but this is granted on a case-by-case basis at Guest Relations and usually requires the mobility device to be medically necessary for the child’s specific condition. For most families, the best alternative is to rent a Disney double stroller at the park entrance or bring a standard side-by-side or tandem double stroller that fits within the 31" x 52" footprint.