Children who love to shake their legs may be related to the immaturity of the central nervous system, or may be caused by bad habits, calcium deficiency and other reasons. 1. Immature development of the central nervous system: common in small infants, due to the immaturity of the central nervous system development, for the muscle control ability is poor, it is easy to appear the phenomenon of wobbly legs, especially by the external factors of stimulation, can appear obvious wobbly legs. 2. Bad habits: children are in a period of growth and development, for many things there is curiosity, like to imitate the behavior of others. If people around them have the bad habit of wobbling their legs, the child may gradually develop the bad habit of wobbling their legs due to imitation. 3. Calcium deficiency: some children due to long-term excessive partiality and picky eating, resulting in a lack of calcium, resulting in a decrease in blood calcium levels, resulting in increased muscle nerve excitability, there may be a love of shaking the phenomenon of the leg, may also be accompanied by leg cramps, numbness of the limbs and other symptoms. Children love to shake their legs, may also be caused by other reasons, to rule out physiological factors, should promptly consult a doctor to confirm the diagnosis of the cause, to give targeted treatment.