@dfoster85 - I've heard that about babies and cold medicine. My pediatrician will recommend baby Benadryl sometimes for congested toddlers, but I know it's not the standard advice. (Actually, you have to get children's Benadryl and the pediatrician tells you how much to give because the bottle says it's for, I think, ages four and up.)
Benadryl, of course, makes you sleepy, like all the old antihistamines, so that's another consideration in choosing a cold medicine. For myself, I like to get one of the new non-drowsy antihistamines like Claritin, with a decongestant in it. But to get pseudophedrine, which is probably the most effective OTC decongestant, you have to ask at the pharmacy counter. People use it in their meth labs, so it's pretty tightly regulated.