Robot Turtles could be a good way to introduce multi-step reasoning. You'll need to be attentive to your kid's developmental level (and don't worry about "other kids." One of the most important things I read was an essay by Keith Gessen in which he related a conversation with his own third-grade teacher who told him that some kids learn to read in kindergarten, some in second grade and in third grade you'd be hard-pressed to tell them apart. As a father of twins who learned to read at different ages, I can verify that this is very true) and be prepared to put things aside for months or years as necessary. And there are some pretty good screen-based things a well (I was a little startled to look at my second-grader son who was hypnotized with his iPad while I was working and mom was busy and saw him casually doing some basic algebra problems out of his own volition—although I am quick to admit that there's plenty of Minecraft time too).