Based on the same H.G. Wells story as his later Food of the Gods, this silly but good-looking fantasy from Bert I. Gordon is among his more entertaining films. The young Ron Howard plays Genius, who develops a substance which causes animals to grow to monstrous size. After eight kids (led by Beau Bridges and Tisha Sterling) crash their car in the mud, they dance and get drunk, then steal some food containing the growth-gunk, causing them to attain huge physical size as well. It's up to the good teens of the town (including Tommy Kirk, Johnny Crawford from The Rifleman, and "Mickey" crooner Toni Basil) to set things right. That involves a gas-like antidote and a lot of subpar musical numbers from the likes of Freddy Cannon and the Beau Brummels. Joseph Turkel and Rance Howard are also in the cast, and a jokey ending features a number of midgets including Felix Silla, best known as Cousin Itt on TV's The Addams Family. The first in a projected 13-picture production deal with Joseph E. Levine, Gordon followed this with the William Castle-inspired Picture Mommy Dead.