Aeromax Sky Scrapers is a very entertaining toy that really delivers. The spinners fit on the top of the handle and a strong pull on the built in self retracting cord sends the spinner skyward for what seems to be an amazing height – easily 100 ft. or so. This is accomplished because the spinners have three support ribs that function as mini-propellers. This toy is well made and provides many trouble free hours of entertainment. Watch out for windy days as the spinner may drift quite a ways! If you do loose a spinner to a roof or tree we sell a separate package with 6 glow-in-the-dark replacement disks.