Waboba Balls are a blast, this one does change the lava color and boy does it bounce. Smaller than a baseball, firmer than a tennis ball, but would not hurt to get hit by it, unless it was thrown hard.More infoReview of the Waboda balls, prior to use in the ocean, water but at least a good explanation of themLava Ball, Fun size, bounces REALLY well, good ball to play with on cement, surfaces, kindof hard, like a hard foam, some cushion, 2.54 oz, for reference a baseball is 5.3 oz.Street ball, really good on surfaces, I think it is meant to take somewhat erratic bounces, but bounces fairly true. 1.86 oz. About the same sponge level as the Lava Ball. This seems like it will wear well on cement.Sol, This seems like the safest most kid friendly, as it is 2.2 oz, almost as big as the softball, seems like a very light weight foam so it won't hurt if hit by it. It won't go near as far as the surf or extreme. Those are almost projectiles. The Sol might be a little big for under 6 to through well but then kids should do fine with it.Surf, this is very similar to Extreme but a softer gel like filling, almost like a soft stress ball. Really well constructed. 2.83 oz, it is a little larger than the Extreme, not much.Extreme, oddly enough this is 2.9 oz, it feels a lot heavier than the Surf. It is a little smaller but much more dense. I think this one should be played with carefully on the water as it seems like it could pack a punch.
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