Cetaphil Moisturising Lotion is generally considered safe and gentle for children, including an 8-year-old girl. It is designed to hydrate and protect sensitive skin without harsh ingredients. However, here are some key points to consider:

• Mild and Non-irritating: Cetaphil products are known for being mild and suitable for sensitive skin, which is beneficial for children.

• Patch Test: Before regular use, it's a good idea to apply a small amount on a small skin area to check for any allergic reaction.

• Consultation: If the child has any specific skin conditions like eczema or allergies, consulting a pediatrician or dermatologist is advisable before starting any new skincare product.

• Usage: Use as directed, typically applying to clean, dry skin to maintain moisture.

Overall, Cetaphil Moisturising Lotion is a commonly recommended option for gentle skin care in children, but individual sensitivities should always be considered. It is best to discuss with a pediatric dermatologist to ensure it suits the child's specific skin needs.