First of all, where were these toys when I was kid? I would have loved to have an engine like this to play with. I know its a kid's toy and part of me still has not grown up. I am half tempted to buy one, however $40 USD (€37.29, £31.21) for a bunch of plastic bits is a bit too expensive for me.
A plastic V Twin engine for kid to pull apart, rebuild, and learn about.
An engine repair play set. Lift the bonnet/hood and the tools are inside. (This would have kept me and my brother very busy as kids.)
So I found some wonderful educational videos on how engines work, geared toward kids. Adults may find this useful as well. You would be surprised at how little some people know about the cars they drive. Anyone who owns a car should know how it works. So I am sharing these videos I found below.
I think this subject should be taught to kids of all ages in school. Cars are the one thing most people use and when kids grow up they will most likely drive cars too. An engine is also an interesting way to teach maths and physics (You could potentially teach more than just math and physics using a car.).
This would also make a great extra curricular course as well. When I was in my later years of school, the school I went to did offer an auto body class (it may have had a machine shop course along with it). I never took it because I am not interested in repairing car bodies. If they had an engine repair course I would have taken that.
So now that I am done babbling, on to the videos, there are 3 parts. I hope you enjoy them.