Weakland Mark

Smash!: Wile E. Coyote Experiments With Simple Machines

Fred Flintstone's Adventures With Screws

Football Opposites

Scooby-Doo! And The Truth Behind Mummies

Gut Bugs, Dust Mites, And Other Microorganisms You Can't Live Without

Scooby-Doo! A Number Comparisons Mystery

Pass, Catch, Tackle

Thud!

Scooby-Doo! A Subtraction Mystery

Fred Flintstone's Adventures With Wedges

Whoosh, Crunch, Roar

When Martin Luther King Jr. Wore Roller Skates

When Wilma Rudolph Played Basketball

When Amelia Earhart Built A Roller Coaster

Magnets Push, Magnets Pull

Fast, Strong, Fearless

Seeds Go, Seeds Grow

Scooby-Doo! An Addition Mystery

Fred Flintstone's Adventures With Pulleys

Fred Flintstone's Adventures With Wheels And Axles

How Tall?

Yogi Bear's Guide To Animal Tracks

When Martin Luther King Jr. Wore Roller Skates

Zoom!

Whoosh!

When Walt Disney Rode A Pig

On My Bike Paperback Book By Mark Weakland

Zoom!

Whoosh!

Scooby-Doo! Unmasks Monsters: The Truth Behind Zombies, Werewolves, And Other Spooky Creatures

Basketball Records

Baseball Records

The West End Treehouse Mystery

Duck-Billed Dinosaurs: Ranking Their Speed, Strength, And Smarts

Scooby-Doo! And The Ruins Of Machu Picchu

Zombies And Forces And Motion

Football Abc

Scooby-Doo! And The Pyramids Of Giza

The Solid Truth About Matter

Extreme Sports Records

Hockey Records

Football Records

Soccer Records

Basketball Records

Gears Go, Wheels Roll (Science Starts)