This is a common issue w/bully pups… my baby is almost 5 mos, and I'm dealing w/it again as well. I try to distract him as much as possible w/a toy, nylabone or whatever your baby prefers. If he gets WAY out of control, I put him in a sit/stay to get his attention… and if he still continues a time-out in the crate or gated area. That way he will understand he is not allowed to hang-out w/you guys if he can't control himself. Also give him LOTS of praise for making better choices… This faze won't last forever so just hang in there!!!
Oh I forgot to mention… get a variety of toys. Soft stuffed ones, balls, rubber chews, rope toys… some dogs can be very picky. Always supervise him w/the toys in case he destroys them and decides to eat them. Wally loves balls, nerf frisbee, and the large jolly ball.