The Miniaturizer is one of Aviva's most notable inventions. It is capable of shrinking various objects (be it organic matter or technical) to nearly microscopic size, hence its name. It can also be used in reverse to increase objects in size to nearly gigantic levels. It was originally created for the Kratt brothers, specifically to aid them in further biological study. Though it was first seen in Mom of a Croc, it was officially introduced in the episode Mystery of the Squirmy Wormy.