Got a game that should provide hours of entertainment for me and the kidlets. It’s like the Contraptions game but with more thingies. It’s got vanes, lasers, lenses, belts, gears, bunsen burners, steam engines… you name it. CrazyMachines 2 is the name.
The tubes you add, you get a limited amount of them. You have to put the water in the right place to move the wheel to allow the switch to be thrown for the sign up above and to also move the ball down to the left so it lands in a crate. Simple in concept. Making it work takes … tinkering!
Lemur King's Folly 
Tubes and things and tinkering!!! I must find.
If you have a Steam account you can download it from there. It takes a hella long time to do so – just start the download and go to bed.
If not you can get it through other avenues. I assume you can get it on Amazon or the innernetwebtubey thing.
My girl and I just spent the last two hours playing it – gears, gravity, flaming bolts from crossbows, electrical cords, robots… and she managed to get one that was causing me no end of grief. She’s eight and we had a freakin’ blast together.