Answer: They have 132 water bottles all together .
Explanation:
Given : Each child is riding on the pony with a saddle.
Each saddle has exactly 2 saddle bags on it.
Each saddle bag has exactly 3 water bottles in it.
Then , the number of water bottles each saddle has =

22 riders altogether are in the group.
Then , the number of water bottles they have all together =

Therefore, they have 132 water bottles all together .