what can i do for mouthing of 4 months old baby girl?

A. At around 4 months of age, it's normal for babies to start mouthing or exploring objects with their mouths as part of their natural development. This is a way for them to learn about their surroundings and develop their sensory skills. However, it's important to ensure that the objects they put in their mouths are safe and free from small parts that could be choking hazards. Always supervise your baby during this stage of exploration to prevent accidents, and continue to offer age-appropriate toys and objects for them to explore safely.