kids age of four or younger

Ok here is a question that maybe some of you can help me with.  I have two boys the age of 4, not sure to talk to them about me going to the hospital for two nights or not.  What did you do and say to them?

Well for some reason my other post didn't come thru so I'll try it again! At that age they won't know what you are talking about. I would just tell them you will be gone for 2 sleeps.When you get back you can show them your tummy and explain that they need to be careful around it so they don't make it hurt. I think any more than that would just confuse and scare them.