Molly,
Congrats on your baby and the start of school this fall!
Of course I can't begin to tell you what to do with your daughter because I don't have enough info, but I can give you some suggestions that are age appropriate. Allow her to spend play time with you in positions that are conducive to her ongoing development. If she is lying on her back, a boppy (supervise her at this time) would be helpful to allow some flexion, the ability to bring hands together, see her feet, and help get hands to mouth. Toys that will attract her to look such as the toy you can lay the baby under and items hang down and they try to grab. You can also do this while holding her. On her tummy you may want to support her to prop on her elbows when she is ready.
Again, you can't go wrong with little rattles, or rattles that velcro around wrist or ankle. Development goes from the center of the body out, and head to away from the head, so the positions I mentioned will help that development. Often times the age appropriateness is marked on the toy. Just help her to play with it if she is not able to do that herself, and enjoy yourself!!
Keep us posted!
Lorraine
Have you been to the Advance for OT Blog?
Lorraine Calhoun