Tfox, that's the best part of using heavy tips, it becomes relatively simple to match spine on a wide variety of arrows. For example, a full length Goldtip 3555 with 200-250 grains on the tip can be made weak enough to shoot at many low draw weights. If that isn't weak enough, you can add tip weight. You can do the same thing with aluminums.

And yes, I've built arrows like this for kids. They can be made to fly very well. A little bareshaft tuning will get you into the proper spine range quite easily. Unless they have somewhere around 23-25 inches of draw length and at least 35 lbs of draw weight, hunting big game is not a totally sure thing with any setup. However, the lower their draw weight and draw length, the more important the heavy weight arrow becomes.