I have been to AK three times and it is still not to the point of a half-day park for me. There is so much to do. We arrive half an hour before the park opens and stay until close and still don't do everything we want to do. If you only have a half day in the park, then I agree that you should skip Planet Watch. However, I think it is definitely worth doing if you can make the time. We really enjoy the train ride and petting the goats, banal though it may be. It is relaxing and enjoyable. We have also met some cool characters with practically no wait there. We got pics with Jiminy Cricket and Rafiki. I think a 10 year old boy would enjoy It's Tough to Be a Bug and Primeval Whirl, too, and I agree with a previous poster that Dinosaur is a must. Your plans don't include Finding Nemo, which a neat show, and FOTLK, which is an even better show. You can also meet some really fun characters like Russell and Dug and Baloo and King Louis who are not in any other parks. I think you have time to do the things on your list, but that is really missing a lot for a one and only trip to AK.