Stella gives great advice. Sometimes people think small children need to know things to understand but that isn't the case. They can only process things in their young minds to a point. Often times it is our guilt as parents that we are trying to fix rather than what is best for the child.
I think I must have asked my dad every year for 12 years to take us to Disneyland. My mom would argue with him, telling him he wasn't being a good dad etc and that was worse than not going. I know now that it wasn't about where we went, it was about us as kids wanting to spend time doing something fun with my parents.
But we did go on some pretty cool road trips that cost next to nothing, so there are always other ways to achieve the same goal. I'm in my forties and I turned out ok for not ever having been to Disneyland. So don't let the guilt trip you up when you are facing some real struggles.