I received the backpack today without the math kit it was suppose to come with. I contacted Amazon.com and was told since MTVN direct sells it and they are always in flux (and some other nonsense answer) I cannot get the math kit and just return the backpack for a refund. All I want is the math kit! There isn't even a # to call MTVN at. The backpack itself is cute but not worth 29.99 w/o a math kit. So I'm unfortunately sending it back. ;(