Welcome to the Disney Parks Moms Panel, Melissa! What a wonderful group trip you have coming up. I always use the Baby Care Centers for my preschooler and still my grade schooler. The quiet TV room is a great place to recoup while the essentials store lets me pick up anything I left behind or need to stock up on, like sunscreen and snacks!
The
Baby Care Center is great for feeding, nursing, chilling, etc. but there is no child care. The centers in each of the Theme Parks is a place for you to care for your kids. If you need a break, Kids Nite Out provides in-room babysitting services as a Disney authorized and preferred childcare service. You can also think about sending your older child to the Pixar Play Zone, where kids ages 4+ can have a night on the town while you spend time with the rest of your family. As for strollers, the Disney Parks
strollers can be rented for $15.00 for single or $31.00 for double. Should you choose a Length of Stay rental, the price decreases. I actually prefer renting from Kingdom Strollers, a Disney authorized service that provides strollers at an amazing rate, and come with a rain cover and cooler, all set up at your Walt Disney World Resort Hotel bell stand. My kids love the strollers!
There are no maximum weight or height restrictions for the rides, but on those like Astro Orbiter, no more than 1 adult and 1 child fit nicely. You can find the minimum heights listed on each ride, under accessibility on the top main description. Most attractions in Magic Kingdom are fit for the whole family! Our extended family loves It’s A Small World and Peter Pan’s Flight for it's timeless magic. If I can help you with another aspect of your vacation, please let me know. ~Lindsey P.