内容简介
Evenbabiestooyoungtocountcanrecognizethedifferencebetweenonethingandtwothings.Andthatunderstandingsetsthestagefornumberrecognition.Vividillustrationsshowoneballandtwoballs,oneduckandtwoducks,onespoonandtwospoons.Byfollowingtheseillustrationsandrepeatingbothnumbers,babieswillbegintorecognizequantitiesandbecomecomfortablewithnumericalsymbols.