Contributions are welcome. Take a hike. When you get to the stream, the kids will get so involved, you won't get any further.
Some people are so inconsiderate as to throw glass into streams.
No, we never actually hike, but often it's too hot anyway. Waiomao Stream at the end of Waiomao Road at the top of Palolo Valley Makiki Valley off either Tantalus Drive or Makiki Heights Drive Manoa Falls at the top of Manoa valley. Those are the easiest, closest ones. You enter the small road that leads to Koko Head Stables. Just outside of the stable gates is the entry to the hike.