Honey, I Blew Up the Kid (1992)

Wayne Szalinski (Rick Moranis) is experimenting with his equipment again, but this time for a large company. When an accident in the lab fries some circuits, he is barred from the lab. But 2 year old Adam, was unknowingly zapped during the accident. But Wayne and the family soon discover that something is definitely wrong with Adam. He starts growing, and growing, and growing, and growing...