If you would like to use this lesson to continue with your History of the Derwent PowerPoint presentation, to add some finishing touches, you can.
Using Scratch https://scratch.mit.edu make a game involving a river and a boat. This could be a maze game, where the boat has to avoid rocks as it travels, a race between a player and a computer boat and you could even include different levels.
Remember that you will need to design 'costumes' to move around your game and backgrounds that they will be placed on.
I hope you have fun making them. If you want to send me a link to your game, I would love to see if I can complete them.