I remember them... three green ones dancing around me and moving around the wall by my bed when I was little. It was very late at night... very dark... and I called out to my parents to come and see them. I wasn't afraid of them... just really fascinated. My parents came into my room... said they couldn't see anything... and told me to go back to sleep. I never thought about it much again until I came across that link. Young children see this kinda stuff all the time... but adults who have lost their ability to 'see' tell them there's nothing there... and over time they too lose this ability. Although I've seen auras and certain energy manifestations on particular occasions... usually when I've been doing some pretty intense meditation and was really able to open myself up to it... my main way of sensing these things is now by 'feel'... or kinesthetically. Once had a 'ghost' poke hard me on the bottom of my foot... waking me out of a very deep sleep. Some spirits manifest as very beautiful and playful... and some are mischievous little pests! *lol*
And more recently... a tree spirit... 'saw' his little face in a knot at the base of the tree in the back yard.