Recent favorite in the mall

No matter which mall that we went, Koko will surely found his favorite area. Why these machines can be so attractive to kids? Luckily, Koko and Didi demand is only for one time of ride. And that's the reason, every time before getting out from the house, Koko will carry some coins in his hand, or else he will ask from Hubby when in the car. '3 pls'. Not too sure why he must ask for 3 coins.