I had a hysterectomy this February (right in the middle of the 2 biggest snowstorms to hit us in 30 years!) and my kids were 6 & 8 (girls) & 2 (boy). I had been having non-stop bleeding, cramping, etc. for almost 2 years so my girls knew that Mommy was having "trouble with her tummy". I just told them that my doctor was going to do a surgery to fix my tummy and that I would be resting for a few weeks & not be able to do things that I usually did (like drive) until I was feeling better.
My Mom came to stay with us (thank God!) since my husband was working out of state & my ailing FIL was staying with us. Even though the kids ended up being home the ENTIRE time I was supposed to be resting (no steps, no lifting, light activity, etc.) I was able to follow the post-op directions to a T since my Mom was here. I would HIGHLY recommend having another adult in the house at all times, especially the first week, so you are not tempted to do too much - the key to a smooth recovery is to let your body heal.
My kids, even the 2-year old, would ask me every day if my belly was feeling better and the girls loved to do things for me, it made them feel so grown up and helpful! The worst part of the whole thing (after the first few days) was that I could not play in the snow with the kids!
Good-luck! Feel free to email me if you have any more questions!
~ B.