I use Math in Focus to teach math to my 7 year old. He loves it! My younger son, who is 5, however, can't sit still, listen to explanations and go through the all the exercises. After a few problems, he is ready to move on to the next topic. He was able to complete Singapore 1A and 1B but now that we have moved to Singapore Math 2A, it's become more and more difficult to complete the pages. We use the workbooks only. After answering one or two questions, he simply walks away and refuses to do more. He is able to add/subtract three digit numbers with regrouping, he knows multiplication (tables 1-12) and division. Some topics are too easy for him, such as introduction to multiplication and division. Other parts, especially word problems, is where he has most difficulty sitting still, listening to explanations, writing down the equations, etc. I've been skipping around to make it a little bit more fun and interesting for him but I'm afraid there will be gaps and I don't like the lack of continuity. Can anyone recommend other Singapore math books that are more "fun" and cater to younger children with less attention span?
Thanks!