Mouthing is completely normal at this age. zit is a sensory play and child is exploring so let it happen. Just ensure surfaces, hands and feet are clean. Also keep small objects high up or away from the child's reach. Mouthing also promotes self feeding at a later age. For any queries, kindly book an online consultation with me. I am a lactation consultant, IYCF (Infant and Young Child Feeding) nutrition expert with an interest in Childhood Infections and Vaccinations. You can check out my Instagram page @drbabymum for helpful tips ! Take care!