E.,
After having moved 39 times in my 36 years of life and having children in the midst of that I think I can offer at least a semblance of a suggestion.
Moving, no matter what age is tough! It will be toughest on you as you make new friends in your new place... kids seem to be like water and find each other naturally!
Kira is a great age to be sharing with her. Don't hesitate and wait.
In the Army we teach that telling your kids and getting them involved no matter the age is important. From experience I can vouch it works. My biggest mistake in one of our moves was letting the toys get packed up without the kids watching. They were very anxious as to whether the new house would have their old toys- even though I told them many times they were in a box on the truck. At 3 they just do not hear "sense" though so you need to show them.
Here are some great ideas I have either experienced or seen work well:
Let her watch HER things go into boxes and let her help if you can (even with a few toys going in makes a diff). Then let her watch those boxes get loaded- the whole process so that she KNOWS her things are coming and she is able to control it in some weird way in her little head. MAKE SURE her boxes are marked very clearly as hers (you can even let her marker them some). We give each child a color for their room and those boxes are marked in matching sharpie (purple my daughter, green for one boy, blue another, orange another)
Since you are taking her house hunting, once one is chosen, ask her what she thinks and if you can give her a choice on a bedroom then do so. You can even tell her that the baby does not get to pick b/c she is a baby but Kira is a "big girl" so she gets that privilege.
Get her a map and a calendar. On the map highlight a few towns along the way and as you drive to the new home she can "connect the dots" with landmarks from you. Additionally give her a map that shows the complete route already highlighted and even though she cannot grasp distance, tell her how far it is over and over. Children this age love new info and her ability to tell a grown up that she will be *32* miles from her old home gives her "knowledge". Take a calendar and mark the moving day with a star or draw a truck etc... and then write the numbers UP from it so she can look at the calendar and see we have *19, 18, 17* days left until the move.
DO give her time to adjust. Kids are resilient though so don't worry too much if you miss something along the way. The key ingredient is YOU. Your attitude will totally make the difference. If you make this an adventure and fun she will see if that way. Take your new address and make a game of learning it. Give her a treat for progress in learning it- whether it be one on one time with you or an m&m.
Note the things that will be in both places. If there are sunflowers in yards near both houses, show her that on this end and then the other. If there are sidewalks, show her; playgrounds? Show her! You get my drift? Make the new place familiar and the idea less scary by showing her the similarities (do you go to dunkin donuts a lot? show her that too).
When you have chosen the new house, take a few pics, print them and GIVE them to her to trot around with her in a little brag book. She will love showing them off to adults and little friends.
Last but not least, if you are able, let her in on decorating her new room. Maybe she is of an age that she has a favorite color to choose for her walls or a new quilt? If there are options on where furniture can go in her new room let her try to choose where to put it.
Hopefully these will help you some. There is a great site for organization that you can use if you are moving yourselves too: flylady.net. It has suggestions for organization and moving with children of any and all ages.
Best of luck to you and yours!!!
J.