Yes, at both Disneyland Resort in California and Walt Disney World in Florida, admission is completely free for "babies" and toddlers under the age of 3. As of 2026, a child only requires a paid theme park ticket starting on their 3rd birthday. This is a significant financial relief for families, as child tickets for those aged 3-9 can cost over $150 per day during peak seasons. Because these young children don't have tickets, they also do not need park reservations or Lightning Lane passes; they simply accompany a ticketed adult. It is important to note that if your child turns 3 during your vacation, Disney's policy generally allows them to continue using their "free" status for the remainder of that specific trip. While you don't need proof of age for entry, it's a good idea to have a digital copy of their birth certificate on your phone just in case a question arises at the gate, though Cast Members typically take the parent's word for it unless the child is clearly older.