I’m a big fan of introducing little ones to the magic of Disney early on, and there is no better place to celebrate your daughter’s birthday! There are dozens of attractions you can enjoy as a family in the theme parks. If an attraction is listed as being for “any height,” then it’s safe for your baby to ride with you! Some favorites my whole family likes to experience together are “it’s a small world,” Dumbo the Flying Elephant, Peter Pan’s Flight, Jungle Cruise, Pixar Pal-A-Round, and Monsters, Inc. Mike & Sulley to the Rescue! For those rides not suitable for your little ones, you may want to take advantage of the Rider Switch program, which allows Guests with children who don’t meet the minimum height requirement to take turns experiencing attractions. One of you can ride while the other adult stays with the kids. You then "swap" so the second adult can enjoy the attraction without waiting in line all over again.
There is a Baby Care Center in each of the two theme parks that will be a helpful resource for you while exploring with your infant! They provide full-size changing tables, private nursing spaces with comfy chairs, and baby food prepping areas with a sink and microwave. You’ll also be able to purchase essentials like diapers, wipes, baby food, formula, bottles, pacifiers, sunscreen, some over-the-counter medicines and other essentials you might need. You can find the Baby Care Center in Disneyland Park at the end of Main Street, U.S.A. next to First Aid. In Disney California Adventure Park, it’s located next to Ghirardelli Soda Fountain and Chocolate Shop.
I hope this helps, Lorena! Please stop by again with more Disneyland Resort questions as your pixie-dusted vacation approaches!