Sixth-graders Mac and Vince operate a business charging schoolmates for protection from bullies and for help to negotiate conflicts peacefully, with amazing challenges and results.

Having expanded his summer lawn mowing job into an ever-growing business conglomerate, a twelve-year-old boy gets involved in high finance thanks to his hippie stockbroker, takes on sponsorship of a boxer, and becomes a media sensation.

Things get out of hand for a twelve-year-old boy when a neighbor convinces him to expand his summer lawn mowing business.

Fourteen-year-old Kevin is a hard worker, so when his income is cut off he begins a series of businesses, from poker games to selling snacks, earning money to take a girl to a dance, but his partners soon tire of his methods.

Mac and Vince have gotten out of their middle school underworld crime business, but an upstart rival business and a run-in with an old nemesis pull them back in.

Discovering that he has been exchanging emails with a corporate spy from a rival company, seventh-grade innovator Billy Sure and his best friend set a trap to catch the culprit before he reveals Sure Things, Inc.'s valuable secrets.

"Wednesday Wilson is in a major funk, and the only thing that can make this day worse is that funks are contagious...and hers is rubbing off on her brother, Mister. When Wednesday discovers that the true cause of Mister's funk is having to present his family tree at the school assembly, she devises a plan to get Mister a Worry Marble that will fix all his problems. And then a crowd of kids at recess also want Worry Marbles to fix their problems, and...

The oldest Mariss brother, fourteen-year-old Dewey, attempts to be the "embodiment of responsibility" as he juggles the management of the family's bicycle repair business while sharing the household and farm duties with his siblings after a sudden energy crisis strands their parents far from home.

Bella, Emily, Maddie, and Sam have been hard at work in their craft studio-so busy in fact, that their supplies are starting to dwindle. It's time to stock up! In order to add a little money to their piggy bank, the friends decide to combine their skills and use the last of their allowance to create their very own business: a lemonade stand! But something's not quite right. While the stand looks fabulous, the lemonade is...not. And where are all their...

After Zara's bike goes missing, her parents insist on her earning money to pay for it, so she and her friend Naomi turn their red wagon into The Treasure Wagon and try and sell some old knickknacks found in her family's basement.