Wikipedia
Motorific is the brand name of a line of battery-operated slot car toys and related accessories marketed by the Ideal Toy Company from 1964 to the early 1970s. It differed from traditional slot car sets in that the cars were powered independently by a pair of AA batteries, rather than by an electrical connection to the track.
The cars ran on slotted plastic track which was snapped together in various layouts, ranging from a simple oval to elaborate patterns, some featuring jumps and hazards ("Motorific Torture Track"). Switches were available; they were designed so that a regardless of the direction from which a vehicle entered the switch, it could exit through either of the other two tracks, and so that as the vehicle passed through the switch, it would reverse the position of the switch, so that if it entered again through the same branch, without the position being manually changed, it would take the opposite path.
After removing and inverting the detachable slot-car pin, the cars could also be run on the floor, with the front wheels steerable into one of three set positions (left, center, right), held by small detents on the reverse side of the pin.
Although some playsets were marketed to feature competitive play between two operators ("Racerific"), in truth there was little allowance for competition since there was no operator control over speed.
Motorific vehicles and accessories remain popular as collectibles, particularly with baby boomer toy aficionados.