I don't know why my daughter loves this rattle so much but she does.  It's bright and colourful, the shape makes it really easy to grab and hold on to, the texture on the rattle makes it interesting to touch and chew on, the balls inside make a great noise.  All these things contribute to a really great rattle.  It can be shaken, chewed on, thrown, and grabbed.  My daugther played with is more than any other rattle she was given when was a newborn and still grabs it now for a bit of a "shake and chew" session at 1 year old.  A good quality and fun rattle for your baby.