I played bocce ball while visiting my parents a couple years ago, and fell in love with the game.
Before last summer I purchased a set of bocce balls made by Franklin on eBay. It is a four-player model, which includes four pairs of different-colored 90 mm balls and a smaller jack (point) ball. The balls are light, and made of a cheap plastic material. This set was relatively inexpensive, and I found myself wishing I had paid more money because the balls in this set are not very big, nor are they as heavy as I'd like. For me, the game is not as challenging with these lighter balls. But, because they are lighter, it is a nice set if you have children that want to play.
If you are going to invest in a bocce ball set, I would spend more money. Franklin makes sets that are of higher quality than the four-player model. If all you want is a set to play bocce ball with the kids, or to see whether your not you like the sport then this small investment is a good bet for you.