What did mrs little give margalo in the story Stuart Little?

Mrs. Little gave Margalo, the mouse, a tiny dollhouse in the story "Stuart Little."

Margalo was lonely after arriving at the Little's home, and Mrs. Little wanted to make her feel welcome. She found a dollhouse in the attic, but it was far too large for Margalo. So, she took it to Mr. Little, who scaled it down to an appropriate size for the little mouse.