Manhattan Toy Wimmer-Ferguson Travel Activity Car Seat Gallery From Manhattan Toy's award winning Wimmer-Ferguson infant collection - the original innovator of black and white developmental toys Eight interchangeable graphic cards offer a range of simple to more complex images to foster visual development Graphic cards are labeled by age to guide you with recommended graphics to use as baby's vision develops Constructed of a sturdy nylon material with an adjustable strap for easy attachment to vehicle headrests and play areas Attach to front seat head rest for forward facing car seats or rear seat head rest for backward facing car seats Includes extension strap for additional length when needed