Sequoia Lodge is a great hotel! It also has a shuttle bus to the parks. The walk dosn`t nessesarily takes 15 minutes. It depends how fast you walk. You can go out in the back, towards Lake Disney.
After breakfast, check out what character is ithere. It`s on the same floor as the lobby.
As for rides, fantasyland is for smaller children. I think every ride there you can try with your son. Snow white and Pinocchio are dark rides, and can be scary for some children. Peter Pan is in the dark too, but "friendlier".
In the end, you`re the one that knows your child best, so you can try almost everything. (if he is tall enough. They have hight restrictions on some rides!
So, have a great trip!