Fun with Mieszky

I heard Zumzum laughing when I was in the kitchen, and I went to have a look, and this was going on: 

Zumzum gets the ball ,

Then she throws it. 

Here comes the BALL!!!

Mieszky runs, jumps and gets the ball!
Mieszky can run and jump so high Zumzum loves it!
Zum is laughing, "hahahahaha" every time Mieszk jumps and catches.
How did they think of playing Catch???
That is one of the most amazing things I've seen.