If you mean children in the IK chain, then I guess my answer is that it would be great to have the ability to do both. If you mean child props and such, I guess it would be good to have both there too. Perhaps an explanation of how I use lock most often would help. Usually, I'm trying to get hands into position with the transform tool, and I lock hip, abdomen, chest, one or both collars, and one or both hands. It would be great to have a way to lock and unlock the hip, abdomen, chest and collars all at once. Thanks very much for writing that script btw, I'll test it now and let you know what I think.