We have taken our 4 youngest children when they were infants. It can be so much fun to watch their faces as they take it all in!
I just held the babies, usually with a light blanket-there can be blasts of cold air from the a/c.
About Pirates...The first time I ever went to Disney was when my third child was 3 months old. I had her on my lap. I wasn't really holding her, just letting her lay there. The rides we had been on before were very gentle and this had worked well for us. I didn't know about the "drop" and at the last minute my DH quickly told me to hold on to her tight. Thank goodness.... she probably would have been fine but I held them pretty close on the rest of the rides after that!
Honestly, the rides are great for little ones. Have a wonderfully magical trip with your friend and her family!!!
I just held the babies, usually with a light blanket-there can be blasts of cold air from the a/c.
About Pirates...The first time I ever went to Disney was when my third child was 3 months old. I had her on my lap. I wasn't really holding her, just letting her lay there. The rides we had been on before were very gentle and this had worked well for us. I didn't know about the "drop" and at the last minute my DH quickly told me to hold on to her tight. Thank goodness.... she probably would have been fine but I held them pretty close on the rest of the rides after that!
Honestly, the rides are great for little ones. Have a wonderfully magical trip with your friend and her family!!!

. All kidding aside, so many people made comments about how "brave" I was, but at this point, all she does is eat, sleep and poop! Nothing brave about that. It's much easier than trying to control them after they start walking, (DD was 14 months and INSISTED on walking all the time!) The only thing with a small infant, we stayed in a suite ($$$$$$$) so that DH and DD3 wouldn't be woken every 3 hours for the feedings. And of course, we took a pretty slow pace, which we've done ever since we started having kids. 
)