Brilliant for Staffies...
All three balls are excellent. The glow in the dark ball is the hardest and least suitable for indoor use - but my children love it even more than the dog - so they do use this on the stairs and landing. This does bounce, but has the least bounce of the three. The glow lasts for ages with any light but the effects if you charge it by shining a black light on it are amazing. I feel this set would be worth the price even if this was the only ball you got. The red ball really does whistle, is a bit softer and has more bounce.