Skelsies. Man that was fun. Growing up on 53rd Street in Bayridge, we played all the time. We would melt crayon in the caps for design and power. Also, we would take a coke bottle and if you ran the top along a manhole cover, just hard enough, the ring ould pop off, you would then rub the cut side down, and voila, it would glide forever. Unfortunately loaded caps could literally smash you. I live in Charlotte, NC now and was amazed to pass a skelsies board in the street recently, I never found out where it came from.