Here's a fun activity book aimed at infants ages 6+ months from Tiny Love, known for its super developmental toys for very young children.
The eye-catching cover is a plus, with shiny colored plastic
cutouts sealed inside a peek-a-boo circle. Shake them for a kaleidoscope
of color. Inside, Baby will discover movable doors, a windmill,
pop-up 
worm, unique textures and crinkly sounds,
and activities that require pulling. A baby-safe mirror invites
exploration and discovery.
Happy-faced animals and pretty outdoor scenes like flowers and trees make this a fun book that Baby will return to often. Attach the carrying strap to a careseat, stroller, or diaper bag for the utmost in portability. (No more lost books in grocery stores!)