Essential Tremor: This is a common movement disorder characterized by tremors during voluntary movements or with posture. It can be inherited and often starts in childhood. The tremor is typically most noticeable when the child is trying to perform precise movements, such as writing or pouring.

Cerebral Palsy: Although cerebral palsy is generally diagnosed earlier in life, some forms, especially those with milder symptoms, might not be recognized until later. It can cause tremors among other motor symptoms.
Dystonia: This condition involves involuntary muscle contractions, which can lead to repetitive movements or abnormal postures. It can manifest as a tremor, especially when performing specific tasks.
Benign Familial Chorea: This rare condition is characterized by involuntary movements that can sometimes be mistaken for tremors. It often presents in childhood.

Wilson's Disease: A genetic disorder that leads to copper accumulation in the body, particularly in the liver, brain, and other organs. It can cause tremors, among other neurological symptoms, and is critical to diagnose early because it can be treated with medication.
Thyroid Disorders: Both hyperthyroidism and hypothyroidism can cause tremors. These conditions are treatable and can have significant health implications if not addressed.
Medication-induced Tremor: Certain medications can cause tremors as a side effect. Identifying and potentially changing the medication can resolve the tremor.

Neurodegenerative Disorders: Such as juvenile-onset Huntington's disease or other rare genetic conditions that can cause movement disorders, including tremors.
Infections or Inflammatory Conditions: Certain infections (e.g., neurosyphilis) or inflammatory conditions (e.g., multiple sclerosis) can cause tremors, although these would be extremely rare in a child without other significant symptoms.
Toxic Exposures: Exposure to certain toxins can cause tremors, though this would be unusual and typically associated with a clear history of exposure.