To be perfectly honest, my 6 month old only has eyes for the one ball with the spiky things sticking out (he tries to teeth on them) but I'm hoping as he gets older he'll be more interested in the different textures. These are SQUEAKY TOYS by the way, and I have a funny feeling this product sometimes gets a different label slapped on and then marketed to dogs instead of babies. These balls are also useless in terms of bouncing, but would be fine for a game of catch (or fetch, as the case may be). The squeaky sound is fairly annoying to adults; baby glanced up startled the first time he heard it but is otherwise uninterested. Overall a decent toy for price and variety.
