Well, my boys LOVE it and when Ritchi wants to bait Sammi into palying, he rolls the ball around and around until Sammi comes running (Sammi has claimed it for his own so when Ritchi plays with it, Sammi attacks - Ritchi knows this and does it just to piss Sammi off) and then they tackle eachother and start to play fight.

It's the funniest thing ever.

Ritchi just sits there waiting for Sammi to come and then they're off. It's quite a sight to see.