do you use cards in your routines?
if yes, then get it, if no, then don't
also ask yourself: "for what i'm going to invest, is this the trick that i will be using? Do i like gimmicks? do i just want it to have a arts and craft toy or do i want it to actually want to use it at school, work or anywhere you can use it?"
Another thing, are you cautious? This is a fragile gimmick which you will need to take care of.
Just think about this for a while and then take the leap of faith, or invest your money in an other Theory11 product.