Disney theme parks generally operate on an "honor system" for children's ages, but they can and do perform checks if a child appears older than their ticket indicates. In 2026, children aged 3 to 9 qualify for child-priced tickets, while those 10 and older must pay adult prices. If a cast member has doubts at the turnstile, they may ask the child directly how old they are or ask the parent for clarification. While birth certificates are not strictly required for park entry, having a digital copy or a photo of one is a high-value strategy if your 9-year-old is exceptionally tall. It is important to note that for certain "Kids' Summer Ticket Offers" in 2026, the age limit is strictly enforced at the point of sale and during reservation linkings in the MyDisney account, where profiles must accurately reflect the birth dates of the guests to avoid issues during entry or when booking Lightning Lanes.