WHEELS
Wheels are sold with a nail to tack them up onto a verticle surface, such as a power pole or fence post. Make sure that you don't nail it too tightly or it won't spin! And spin it will - often changing colors and with screaming whistles!
Happy Lamps are a horizontal wheel - it is sold with a string to tie it up to a tree branch or maybe even a clothesline. After spinning, and spinning, and spinning (don't get too dizzy watching it!) it will pop open into a colorful Chinese Lantern!