Joshua 4:1-24
Joshua had them pile the stones as a memorial so they had a place to take their children back to to remind them what God had done.
I would speak about building memorials in our lives - having places that, when our children need to be reminded what God has done and what He can do now and in the future - we would be able to take them back to those times. We can say to our children, "If God was able to bring us thru *whatever it was*, then we know that God is able to take us through whatever we are going through now.
Build faith in your children by reminding them who God is, how much He loves them and cares for them and what He has done for them.