Biography Wikipedia
Wikipedia:
The Invisible Kid is a 1988 American comedy film directed by Avery Crounse. The film stars Jay Underwood, Chynna Phillips and Karen Black.
Plot
Following in his deceased father's footsteps, Grover Dunn (Jay Underwood) finds a magic formula that makes him vanish. The formula causes all types of trouble for Grover and his mother (Karen Black) and his crush (Chynna Phillips).