A play gym is a staple in any household with a baby and for good reason. Play gyms not only entertain your baby but also stimulate cognitive and motor development. Play gyms are fun, colourful, and educational. The one we have is the Fisher Price Deluxe Kick And Play Piano Gym. My baby loves this play gym so much and even though she plays with it on a daily basis, she has not grown tired of it yet. Read on to find out why.