Our organization uses a mix of the lightweight blue pucks and black pucks for the young kids (U8). I love everything about ADM, the cross-ice games, the new practice formats...but I'm not sure I'm sold on the blue pucks. And it has nothing to do with the color or the weight, as I understand using a smaller, lighter object (like other sports do) makes sense. My issue with the blue pucks is that they do. not. glide. They're not heavy enough. Kids will skate around with them and as soon as some snow builds up, the blue pucks stop every 5 feet. They just don't have the weight to glide along the ice. For that reason, I prefer the black pucks. For shooting practice, fine, blue works. But for actual gameplay or stickhandling drills, I like the black ones.