My DS11 has had a problem with his ears since he was born (had tubes put in, etc.). The only thing that ever helped him was the earplanes. You can give a baby, toddler, small child something to suck on, but on our last flight home in July, there were, no lie, 5 small children under 3 yrs. old, all of them had something to chew or suck on, and all 5 of them cried in pain whenever the pressure in the cabin changed. Some people were very annoyed, but I felt horrible for these kids, having been through it with my DS. Depending on the age of your child, if you can get them to keep the earplanes in, they are a blessing! Last year my DS tried to go without them, and was in tears from the pain. I will never fly without them again.
Sheri