Electrically powered slot cars which draw power from the track. They became extremely popular in the 1960s, but commercial slot car racing experienced a rapid decline in popularity late in the decade. By the end of the 1970s, the slot car hobby had diminished significantly, especially public tracks operating larger scale cars, and modeling in general was on the decline (HO Slot Car Racing 1999–2011). One website attributes the weakening of the pastime to both the ageing of the baby-boomers along with the fragile economics of the slot car industry and the closing of many commercial slot car tracks perhaps as toy companies offered smaller sets to be used at home (Slotblog 2007). A wide variety of electrically powered vehicles, however are available today – in various forms.