My wife and I, on a Sunday evening, had just been discussing the "devil face" apparent in the 9.11.01 burning tower images. I was commenting something to the effect of "if this is proof of the devil, then we have proof of God." We were talking about this in a religious aspect as to how this reaffirmed our faith.
Our (then) 16 month old daughter was during this discussion looking at a picture of an actress holding an Emmy (or Oscar, whatever it is) award that has the wings on the back of it. We couldn't figure out why she was so obsessed with this picture until I finally realized that this image reminded her of an angel. She knew angels from books we've read.
At the moment that my wife and I realized that she thought that was an angel, a little magnatized electronic toy (meant to stick on refrigerators) all of a sudden started playing. It was sitting in the middle of the floor and nobody had touched it. There was no physical way for it to have started playing. The synthesized tune was "twinkle, twinkle, little star...."
Keep in mind that all of this happened very quickly. My wife and I looked at each other and took it as a sign that angels were present.
It's been said that younger children are more open to seeing things like angels, spirits, etc.
This was one of many "little signs."