I want more cards!

My little 妹妹 wants more flash cards! I have showed her flash cards when she was about 6 months old. After 2 months, she could pick out the correct cards when asked. At the same time she also loses interest in it. Early this month, I showed her flash cards again. This time round, she seems interested again. Last weeks she just refuses to let me stop showing her the cards! I can show her 2 rounds of 5 sets of cards, which contain 10 to 15 cards per set, and she still wants to see them. If I stop she will be angry and she will start to pick up the stacks of cards and start to see it herself! I went to the Popular Bookshop to look at the flash cards they have. I found that either the cards too small or the words are too small. The topics are always the usual like colours, shapes, animals, body parts, etc, which I have already made. Seems I have no choice but to make some more on my own. There goes my beauty sleep again …