Hi Stacy!
Thank you for bringing your question to the Disney Parks Moms Panel. I actually just returned from my last trip before my little one hits his big 3rd birthday!
You are absolutely correct that admission for mouseketeers under the age of three is free! It's not until their 3rd birthdays that your little one needs something to enter
Disneyland Park or
Disney California Adventure Park. Since you will be traveling with a toddler, I wanted to make sure you knew about the
Baby Care Centers on property. While I'm sure your kiddo, just like mine, is 2 going on 20 and you may not think of a Baby Care Center as a necessity anymore, they are still a great resource for all little ones! Here you can pick up anything you may have forgotten at home, like wipes, sunscreen, and tissues, because we've all been there before. For my most recent visit, we also found their "little potties" to be practically perfect for my potty training toddler.
Please come back if you have any other question before your visit this summer!
-Lindsey