I can tell you all firsthand Carl had zero problems moving to the spot. Footware is not a problem for Carl.
Myself, I pop into the Nexy HQ
Tibhar Samsonov Premium Junior is nice; it is designed for small hands
from the Tibhar catalog:
Is there any suggestions for children blades !
It's always been a terrible rule because it fixed a problem that didn't need fixing and because it is difficult to enforce from where the umpires sit,