Materials –

Spray bottle (the plastic kind is easier and lighter for younger children)

Toilet paper rolls

Balls medium size (I used the plastic baseballs)

Line up the toilet paper rolls and place the balls on top of them. Demonstrate to the child the activity of spraying water onto the rolls to move them while dropping the balls. The activity can become more difficult as the child moves further from the table. 

This activity targets fine motor skills and cause and consequence concept.