YES. I used them for both kids, including my 4.5 mo baby when we went in 2016. She slept through fireworks at every park. Even my then-4yo used them at Mickey's backyard BBQ to dance and avoid sensory overload - and she does not have sensory issues! They are top on my list of "never realized I needed them until I got there, and really appreciated having them." Some of the rides and shows can be terribly loud, too.