Just went through it, and I am going to have to say I laughed. Mainly because I remember doing more or less the same effects when I got started. So when I say that the tricks you just did are in fact the ones that I had to play around with and work on the most, I probably am not lying. So I have some feed back
1. Great job swatting the kids hand away when he went for the grab, you showed him that you are in control. That everything is in fact your show, and while the entertainment is there for him, he does not control it. It is those quick responses that will grow more and more as continue to learn.
2. Don't put so much focus on the blue card when you give it to them/ put it down. When you say, "Don't look at that just yet" they are going to be thinking, "Well, why not???" Instead, pull their attention else where. I usually put it down while saying, "Do you think I can do it again? Just tell me when to stop." Or something along those lines. Don't direct their attention to the sleight you just did, direct it far away from it.
3. This is my opinion, but I think it is worth knowing. Most of that video... Maybe all, I can't remember off the top of my head, was based off of one sleight: the double lift. The double lift is a fantastic sleight, and should be utilized, but utilized with caution. Once you are caught doing it, and you will get caught with the volume of your use, everyone will be able to peg you there after. And trust, you can do something with the double lift that will blow minds so you don't want to lose that benefit. A way to fix it other than doing other sleights mixed in what you are doing are, is just learn different ways to do a double lift. That way everything looks different.
Overall, I am going to have to say that it is a good start, at least, it is the start that I had. Keep up at it and you will see great things.