It's a parade day for the 3 little firefighters and they have to look their best. But their coats are missing buttons and their belly buttons show! Time to get out the button box. Each coat will need 4 buttons. They try to sort them by color, and then by shape, but they can't make enough sets. What if they try sorting by size instead? Ink Spot the dog wants to help!

Sorting by attributes lays the groundwork for understanding number patterns and identifying geometric shapes.