Water Table, for the Kids

Step 9: Make some holes for the water to come out

Drill small holes in the plug inserts that point up. Small is key here. If you make the holes too big before you test the water pressure, you could end up with not enough water pressure. You can’t re-drill a smaller hole, only a bigger one. So start small.
Drill some holes along the underside of the horizontal fountain pipes. Take it easy with the size and number of them; you can always add more later.