Bought 2 set of cards for the kids sometimes back, 1 set is addition which 2 darlings have fun playing with. The other set is multiplication cards. Didn't really teach Charis on multiplication as I find it too difficult for her, i think it is for 8 years old and above, but I bought it together with other purchases to save the shipping cost. Today Charis darling decide to give a try, to learn it. Of course I am very happy to play with her. Very difficult for her and myself. I have no idea how to teach her, still have to 硬着头皮上。。。