We haven't actually gone through a deployment yet. We are still waiting to find out exactly when he will leave (hurry up & wait!). We have a 2 year old daughter who is very much a daddy's girl, so I am worried about how she will deal with him being gone so long.
Someone told me about this free DVD from Sesame Street that is supposed to help children cope with a deployed parent. It is meant for ages 3-5, but I got one for my daughter anyways. I have not watched it yet tho, so I have no idea what it is like. I want to watch it before letting my daughter watch it just so I will know what it is like before she sees it. You can request one or even download the video from here:
http://www.sesameworkshop.org/tlc/
Also, we got her a "Daddy Doll" from http://www.daddydolls.com. It is a "doll" with a head to toe picture of her dad on one side. We also paid extra to have a head to to pic of his backside on the back of the doll too! ha! Or you can just have a solid fabric on the back. You can also get a sound recorder to put in a pocket on the doll. Dad can record a message before he leaves and when you squeeze the doll it will play the message. They also have pillows & pillow cases, dog tags, and bears with photo t-shirts.
Some other ideas that I've heard about (we haven't done these yet) are to have daddy record himself reading some of your daughters' favorite books, singing their favorite songs, etc. You could just do a sound recording, or if you have a video camera you could have video!
Also, keep lots of pictures of daddy around the house, in your daughters' rooms, etc. Perhaps a scrapbook of pictures of daddy & the girls. You could sit with your daughters & look at the book together. Talk to them (or at least the 2 yr old) about the pictures & help her remember things she & daddy do together. ("There's you with Daddy playing in the sand!")
Maybe some other ladies will have more ideas. It's harder with the younger ones because most of the suggestions I find are for older children who can understand more, like showing where daddy is on a globe/map, or having the child write letters, etc.
Thank your husband (and YOU!) for your service! What branch is he in? Mine is Army National Guard (but used to be active duty before I met him).