My daughter was about 20 months when she first visited WDW. She did love Chef Mickey's, but her favorite was
Hollywood and Vine at Hollywood Studios. She hadn't watched much of the preschool Disney shows before, but she fell in love with the characters instantly.
The breakfast and lunch are character buffets. About every 10 minutes a party breaks out and kids are invited to get up and dance. Your little one may be brave enough to get up and dance but even if s/he isn't, the amount of music, movement, color, and fun will be sure to entertain.
There are many wonderful restaurants for your anniversary dinner. One that comes to mind is
San Angel Inn at the Mexico Pavilion in Epcot. The food and astmosphere are wonderful. There is also a lot to look at in the restaurant. Your little will love the volcano in the distance and the artificial moon light. There is also a great boat ride featuring Donald Duck. My daughter (3 yr) can go on that boat ride 4 times in a row and has. Overall its romantic and should keep your little one entertained.
enjoy