Hardina chose the Spite Building for the site of her store because of its unique shape, which she compared to a toy box.
The store's inventory consists mainly of wooden toys, handcrafted by artisans from all over New England, mostly from Maine and Vermont.
Hardina said she has always liked wooden toys and wanted to sell quality playthings for children.
The selection includes wooden ginger-bread men and trains as well as colorful mittens and clown hats.
"No batteries, no plastic, no computerized junk--just handcrafted wooden toys," Hardina said.
At first the store attracted only local customers, but after three years, it has begun to draw in people from other towns as well, Hardina said.
"A lot of people stop because of the building," she said.
Business at the Toy Box has been going well. "It's growing every year," Hardina said.
While many store owners might feel confined by the limited space inside the Spite Building, Hardina feels differently.
"Most people would think the size is limiting, but I think it's what makes the store," Hardina said. "I have the cutest toy store on the block."
The Cambridge Toy Box is open Tuesdays through Saturdays, from 10 a.m. to 5 p.m., and is located at 260 Concord Ave.