There are limitations in traditional analog clocks. Interestingly, the limitations of analog clocks stem from some of the advantages. Very little has been done to improve the standardized yet arbitrary design of analog clocks. Time can be misread. It's easy to relate to a child's confusion when they learn to read analog time.
Digital clocks give exact time in numerals.
Analog clocks demand a child overcome conflicting information given by two hands which must be read and understood separately. Evidence indicates people of all ages have difficulty making a response that conflicts with their current perception. Children are required to learn the difference between hour divisions printed on the clock face and minute divisions which are basically unseen. They are required to count in fives amongst a dozen intervals. This may be an inappropriate method of reading numbers.