And by the way, if you're a parent, stay and watch, if you can. To see these activities is to understand better EXACTLY what your child is up against.
Finally, if your child doesn't make it, don't fret. Take a look at the U.S. National Men's team roster over the last 3-4 years, and you'll see a number of capped players who somehow got through the ODP process unrecognized. Why? Because ODP can be a harsh numbers game, with talented kids outnumbering capable evaluators.