According to the North Central Regional Educational Laboratory, a manipulative is “any physical object (e.g., blocks, toothpicks, coins) that can be used to represent or model a problem situation or develop a mathematical concept.”
Manipulatives are in the Curriculum Collection on the 3rd floor. When you reach the 3rd floor look for the row of books with the Curriculum Collection sign (see photo).
Most of the manipulatives are in the Curriculum Collection, call numbers 511-516. Here are some examples with links to Albertsons Library’s copy in WorldCat Discovery: