"Mr. Tony is Full of Baloney" is a popular children's book from the My Weird School series written by Dan Gutman.
The story follows the main character, A.J., and his classmates at Ella Meary School. The school hires a new after-school instructor named Mr. Tony, who runs a program focused on fitness, magic, and wacky activities.
Mr. Tony is an eccentric character who claims to have amazing talents and tells unbelievable stories. A.J., who is naturally skeptical, is convinced that Mr. Tony is "full of baloney" (meaning he is lying or exaggerating).
Mr. Tony leads the kids in strange exercises, like "the marshmallow jump" and "the pizza stretch," while teaching them about healthy habits in a very non-traditional way.
Like most books in this series, beneath the silliness, there are subtle lessons about staying active, being creative, and learning to get along with people who have big personalities.