Can I bring my son wading in the river to play with rocks and look for crawfish?

I see kids playing at the edge of the river frequently. The current varies a lot depending on how much rain we have had. There are shallow areas that would probably be safe for him to play, but check it out carefully. No one will stop you from letting him get in the water, but do assess the situation and be careful.

Its unsafe.

it would be ill advised as the current could be quite strong.

It is not a river