Mighty Maddie /
by Stuart J. Murphy ; illustrated by Bernice Lum.
- 1st ed.
- New York : HarperCollins, c2004.
- 31 p. : col. ill. ; 21 cm.
- MathStart .
"Level 1. Comparing weights."
As Maddie cleans up her room, she learns how to compare the weights of various objects.