Hi Robin,
Welcome to the Disney Parks Moms Panel with your question. Cinderella's Royal Table is one of my family's must do dining experiences on every trip, however, I do have a four year old Princess. This dining experience does take into consideration young Princes, they are presented with a sword during the wishing ceremony, but there will be Princesses coming to your table for autographs and photo opportunities. There are also suit of arms that adorn the castle along with coats of arms, and other Medieval touches. I would ask your son how he feels about dining in the castle with the Princesses, and if he is reluctant, offer these suggestions.
Chef Mickey's is located inside Disney's Contemporary Resort and your son will be able to meet the Fab Five. It is within walking distance from the Magic Kingdom, or a short Monorail ride away, which would be fun for your 9 year old son.
'Ohana Best Friends Breakfast is located inside Disney's Polynesian Resort, and is also a short monorail ride away from the Magic Kingdom. Here you will dine with Lilo, Stitch and Mickey Mouse.
Any character dining experience you choose willl be magical for your family. If you would like more details concerning either of the options I have provided, or if you would like some more suggestions, please send me another question. I would be happy to help!
Stephanie