My daughter is 4 1/2 months old. She sits up with assistance. We have a high chair that reclines back a little and that is plenty for holding her up. So I have some large (non-chokeable) toys for her to play with. A few soft rattles. A teething butterfly. A wrist-rattle. In her car seat, we have the greatest thing... it's a row of toys that attaches to the handles. It gives her something to play with while in the seat. It has 3 little toys on it that spin around. My baby loves it... We got it at Wal-Mart. Good luck!