Sorry but to add also, make a fun journey of it for them. I still try too, by making a picnic out of it. Stopping fishing to have some snacks and chocolate etc. remember their attention spans are only short and they are not addicted yet like us!
In summer up here at the end of each trip, we moor up somewhere, put on our life jackets and jump off the boat to cool down!
But the most important thing of all.......... No matter how many tangles you undo, don't get the shits! It's making you a better fisherman!
Cheers scratchie!!!