Description:  The Metric Marvels was a series of seven animated, musical Public Service Announcement (PSA) shorts from 1978-1979 that aimed to teach American children about the metric system. Sponsored by the U.S. Metric Board, the show featured superheroes like Meter Man, Liter Leader, Super Celsius, and Wonder Gram, who used their powers to explain units of measurement like meters, liters, grams, and Celsius. The shorts were part of a larger effort to promote metrication in the United States.

Format: A series of seven animated, musical shorts.

Purpose: To teach American children the metric system (meters, liters, grams, and Celsius).

Characters:

Meter Man: Explains length and distance.

Liter Leader: Explains volume and capacity.

Super Celsius: Explains temperature on the Celsius scale.

Wonder Gram: Explains mass and weight in grams.

Sponsor: The U.S. Metric Board (USMB).

Producers: Created by the same team that developed Schoolhouse Rock! and originally released as filmstrips by Xerox Films before being released on VHS for educational buyers.