we were told to try feed the child pretty much right away to strengthen throat muscles. so after i brought her from hospital, she had veggie soup. that day I kept giving her foods that required chewing but not crunchy. avoid 'red' foods because you need to know if there is any bleeding. give the tylenol round the clock for first 24 hrs even if there is no pain. if you don't, and if pain occurs it will be bad. we were told 10th day can be the worse (yes, tenth), because chances are bleeding can occur. it did, right on the 10th day. nothing major but we had to take her to see the ENT. all in all, my daughter was 4 when she had this done and she did great. you will also be told to 'take it easy' for 14 days. even if your child seems completely recovered. listen to this, don't take him out in cold air (it will dry the throat etc). we kept her inside for 14 days, little outings (house, car, indoor place only).
good luck
ps popsickle as much as he can eat