Gather some or all of the playthings in each category:
Sight: An unbreakable plastic mirror (see Look at Me, a small prism or CD for making rainbows, a tiny flashlight your child can track with her eyes, a family photo in a plastic pocket (see Family Photo Fun, a finger puppet (see Finger Puppets, and a sock for hiding things or for making an instant sock puppet.
Hearing: Several plastic film canisters containing rice, a bell, beans, a coin, and even water (make sure the tops are tightly glued shut or securely duct-taped); a set of blank keys on a key ring from the hardware store; a small windup music box or musical toy, and a tape of you singing your child's favorite songs.
Touch: A variety of 6-inch fabric squares of different textures; a handheld paper fan to make a gentle indoor breeze; natural baby oil for a soothing massage; a roll of tape; several securely knotted baby socks, each holding something to touch and clutch-a cellophane wrapper, piece of waxed paper, uncooked rice, buttons, and Styrofoam.
Smell: Individual sachet squares filled with dried herbs or flowers like mint, lavender, and rose petals, sewn securely shut. Also bring a fresh flower or two.
Babies are sensory learners. Their awareness and understanding of the world develop through stimulation of all their senses.