That Boy Across the Street (1970)

Brilliant young teen, James Evens's newly created invention is a big secret: it’s a device that allows him to teleport large distances in a short span of time. An invention so classified he’s hiding it from his parents. Upon using the device, Evens learns that his new creation is physically harming him. While trying to fix that flaw in hopes to research a newly discovered planet, he realizes there’s a larger threat to his findings: a protective father and paranoid neighbor.