Everything
My youngest was 7 months when we went last December & I just left her in the Ergo carrier & went on everything. She loved Small World, that was probably her favorite, seeing small people like her! She liked Dumbo, Tea Cups, the carousel. LOVED meeting the characters, especially the soft ones like Pooh & Friends. And when she was tired, she'd just crash out on my chest. She slept on Peter Pan, through the line & some of Philharmagic, etc. DHS doesn't have a ton of baby friendly rides but MK definitely does!! She did enjoy the Playhouse Disney show at DHS though!