6 month old babies

How do you play with your 6 month old baby? Mine likes to chew on things and put almost everything inside his mouth... so we've gotten him an activity centre since it's safer as the toys on it can't be pulled out. He likes to be carried and look at things, playing peek-a-boo, listening to songs and us talking to him. Any suggestions on things we can do with him? Any other toys will just end up inside his mouth... 😅