Comic Title: World's Finest Comics #152
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: September 1965
On Sale Date: July 22, 1965 Newsstand Date July 22, 1965
Source: House Ad, Superman's Pal Jimmy Olsen #87, Page 20

Copyright Date July 22, 1965
Source: Library of Congress, Periodicals 1965

Frequency: Monthly, with the exception of Jan., April, July and Oct.
Cover Price: $0.12
Page Count: 32
Editor: Mort Weisinger

Title: "The Colossal Kids"
Pages: 16

Feature(s):
Superman (of Earth-1)
Batman (of Earth-1)

Writer: Edmond Hamilton
Penciller: Curt Swan
Inker: George Klein

Reprinted In:
Showcase Presents:World's Finest Vol. 3 TPB (2010)
Batman & Superman in World's Finest Comics:The Silver Age Omnibus Vol. 2 HC (2019)

Feature Character(s)

• Superman (last appearance in Justice League of America #38; next appearance in Action Comics #328)
• Batman (last appearance in Justice League of America #38; next appearance in Detective Comics #343)

Guest Star(s)

• Bat-Mite (disguised as Speed Kid; last appearance in Batman #161; next appearance in World's Finest Comics #169)

Supporting Character(s)

• Robin (last appearance in Batman #174; next appearance in Detective Comics #343)
• Lois Lane (last appearance in Superman's Pal, Jimmy Olsen #87; next appearance in Action Comics #328)
• Jimmy Olsen (last appearance in Superman's Pal, Jimmy Olsen #87; next appearance in Action Comics #328)
• Perry White (last appearance in Superman's Pal, Jimmy Olsen #87; next appearance in Superman #180)

Villain(s)

• Mr. Mxyzptlk (disguised as Force Boy; last appearance in Superman #174; next appearance in Superman's Girl Friend, Lois Lane #61)

Comments:
Part 2: "The Magic of Bat-Mite and Mr. Mxyzptlk"

Synopsis:
Two super-powered youths, Force Boy and Speed Kid, show off their powers at the Daily Planet. Superman is puzzled by their sudden appearance and summons Batman to help solve the mystery. Working together the heroes try to uncover the secret of the two boys, while preventing damage from their pranks. Each of their theories is disproven as the boys are not androids, Kryptonians, or time-travelers.

When the boys appear in a ship full of robotic creatures, it appears to the heroes that they may be aliens. However, while battling the robots, Batman realizes that the small ship could not hold such large creations. He deduces that the boys are using magic, so they must be Mxyzptlk and Bat-Mite.

With their secret exposed, the imps reveal themselves. Bat-Mite explains that he bet Mxyzptlk that Batman would solve the mystery. Mxyzptlk concedes defeat and returns to his own dimension.