Our biological kids are in their early 20s. In fact, now that I'm in my late 40s, my wife and I are soon going to have the joy of becoming grandparents. In short, we've been at this parenting thing for a while. What that means is that I have lots of incredible, beautiful memories of parenting my kids when they were younger. I also have lots of regrets. Of course, regrets aren't always helpful, but they can be instructive. I try not to sit in my regrets, but I do try to let them teach me, both so I can offer advice to my own son as he raises his kids (if he asks) and to shape how I might engage my children now that they are adults. Here are my top 10 regrets from raising my kids; consider it advice for new dads. 1. Not Playing More When our kids were young, it was easy to spend more time keeping them busy than playing with them. Distracting them so I could get "more important" things done was my priority. If I were to give advice for new dads now...