Here is an excerpt on an article I've written about flying with families for the new site on this subject. Hope it helps!
#3 - Protect their hearing. When we were expecting our first child, we were disappointed to find that there was, and continues to be, a real lack of options for infants to toddlers. A search of ideas on how to protect my little guy's ears eventually led me to some instructions on how to make your own. Follow this link to the article I found at AOPA.
http://www.aopa.org/members/files/topics/family_article5.html While I can't attest to the level of noise reduction they offer, we do believe that they are fairly effective. What we do know is that the design has worked well for all three of our kids. Its bonnet style prevents little ones from pulling them off 5 seconds into your taxi. They are easy to make and you'll only be out a few dollars.
As the kids get towards the toddler age, but aren't quite to the talking point, we've found that children's ear muffs from Lowes or Home Depot work great if you can get your child to keep them on. When they get to the point you need or want to communicate, we found that SoftCom makes children headsets that are very affordable and of good quality. They come in red, blue, purple and pink. You can find them online from various outlets for around $100, but make sure to get the one with the built in jack on the ear cup! This handy feature lets your child pipe in the audio from their DVD player, Nintendo DS, iPad, iPod, etc. right into their headset. A definite must. Those with that option come with the cord for attaching your device. If you don't want that, the same headset minus that feature can be found for around $80. By the time you get them all on aviation headsets, if you don't have one already on your com panel, you might want to consider getting one with an isolate switch. Seems kids are somewhat enthralled at being able to hear themselves and will talk or make obnoxious noises right when you need to be hearing something!
