When baby plays with rubber or plastic toys, he tends to bite on these which cause saliva to flow. At this stage teething rings are useful to feel objects in his mouth. As you provide a variety of food items to the baby, stimulate his taste as follows:
Do not mix too many flavours at a time in his mouth. Once baby gets used to a particular food, mix it with a stronger flavour. Use spices to increase the flavour of vegetables. Try with a variety of baby foods or make new foods of your own by grinding fruits or vegetables.