Mailbox Math is a collection of ten interactive sorting activities that reinforce important PreK-2 math skills. Young children love practicing math basics hands-on with these delightful, sturdy plastic mailboxes and colorful sorting and answer cards. The 5 mailboxes feature pull-down mail slots and secret sliding doors for emptying the mailbox and checking answers. Also includes 80 color-coded blank cards for creating your own sorting activities. Details:Cards printed on 8.5" x 11" (21.59cm x 27.94cm) (cutting required)5 sorting mailboxes320 sorting and answer cards80 color-coded make-your-own cardsRecommended for grade PreK through 2For ages 3 through 8