Olbas For Children - 12ml Olbas for Children is a gentle, yet effective decongestant specially formulated for children and infants from 3 months. This natural formula is a mixture of pure plant oils which releases vapours to help nasal congestion and to restore easy breathing. Useful for colds and flu, catarrh, blocked sinuses and hayfever. Suitable for Children and infants 3 months & over.