This Common Core aligned Math numbers center is based on the favorite classic Alexander and the Wind-Up Mouse by Leo Lionni. Alexander is a real mouse and nobody likes him around the house. They’re always chasing him with a broom and screaming at him when they see him. However, they react very different when they see Willy, the wind-up mouse. A charming tale of friendship and love! Children will use Willy the wind-up mouse to help them count and compare numbers. This set is offered in color to use as a Math center or in black & white to be used individually. It's as easy as 1-2-3!