I was delighted to see that our Japanese Maple produces little "helicopters." We had transplanted the tree to the front yard when we first moved in, and it must have taken it a while to become reenergized enough to produce them because last year was the first time I noticed the little winged samaras. We even had a little Japanese Maple sprout underneath the tree. I'm thinking about growing one from seed because they are so beautiful. I would love to watch one grow.