Phuket ferries identify children as being between the ages of 2-12 years. Infants travel free of charge. Children are welcome on the boats and you may bring car seats and strollers on board. The boats are safe for kids, although be very diligent for their safety. Be sure to locate safety jackets and keep your eyes on your children at all times. Occasionally, the trip can be bumpy so it is wise to come prepared for sea sickness. Check with their doctor in advance regarding potential sea sickness medication.