What developmental milestone involves some children needing assistance with wiping after bathroom use?

The developmental milestone indicating that some children may need assistance with wiping after bathroom use typically corresponds to the age of 4 years. At this age, many children are becoming increasingly independent with toileting, but they may still struggle with the finer motor skills and coordination needed for self-cleaning effectively after using the bathroom.

By around 4 years, children generally have developed the basic skills to use the toilet independently, but they may not yet have the capability to clean themselves thoroughly without help. This is due to their developing fine motor skills and the understanding of how to wipe properly, which can take additional time to master.

As children progress, by around 6 years old, most have gained the necessary skills to manage bathroom hygiene independently without assistance. Thus, 4 years is the age when assistance with wiping is most likely needed for many children, marking a critical point in their developmental growth in relation to self-care.