This isn't going to suit everyone. Amazon is promising an eclectic mix of toys ranging from "robotics to natural sciences," but there will undoubtedly be desirable toys that cost a lot more than $20. And for now, STEM Club is only available to people living in the US. Look at it this way, though: if you'd rather buy a chemistry set or math game for your little one instead of the latest doll, you now have an easy way to make that happen.