Eelpot,
I have made shore dives while visiting Alona(Bohol), Siquijor, Mactan and Moalboal(Cebu), APO Island, Romblon and Samar, I have not been to Aniloa. Of the places I have been to, I think Mactan is a good bet for an 11 year old girl(assuming she has little experience). Moalboal is an easy snorkel over the reef with plenty to see along the way.
One of the nice things about almost everyplace in the Philippines is that you can take very short boat rides to get to some great dive sites. It might be a good chance to use the trip to the RP as an opportunity to get her better aclimated to short boat rides, especially if she suffers from motion sickness on extended boat rides. HTH