1.Why is the positioning of the kids watch inaccurate?

There are two common ways of positioning, GPS positioning and LBS positioning. Please refer to the watch's specifications to confirm which positioning way the watch supports.
If the watch supports GPS positioning, the positioning is very accurate.
If the watch only supports LBS positioning, the positioning accuracy will be affected by the signal strength of local base stations. If base station signal is too weak, the positioning error may be large.