I agree - children are able to do things like that much easier. I used to talk to my friends about this all the time, they'd share their OBE experiences that they didn't realize were weird until they found out not everyone was doing it. Wish I'd been able to do it! :)
I've also read somewhere that in our first year of life we keep a pretty close contact with the Other Side just to make sure that our childhood is going to go pretty much as planned so that we get to experience waht we came here to experience. We're not really totally committed until sometime in our second or third year. This is one of the reasons for SIDS. If the parents use their free will to change something, or are seen to be changing something in the future, something drastic in their lives, it changes the contract for the child's life and they take their first exit point and look for a new situation that better fits their soul's growth. Once they are committed, the Veil comes down and they lose touch and begin the forgetting process, so they can go thru their lessons honestly, with all of the limitations and challenges therein.