Oh god! Poor child! How to put a child off learning for life
Anyway, things my children have loved doing that you could probably say to the parents are in some way educational (can he read, btw?):
Get a large map of the world (we've got one of those lovely ones for children), and then go and look at all their toys/clothes/shoes/anything round the house and see where they were made. Write lists for each country. It's quite interesting. Most things are made in China, Crocs are made all over the world. Embarrassingly enough, we had on the list under India "Mummy's knickers"
Make a plan of your house to introduce maps. Then make maps of child's walk to the park/shops.
Look at google earth together.
We've got a DK book about maps which is interesting with activity ideas
History's harder - how can they have a concept of history at four?
My DD who is 4 is fascinated by Victorian Farm, but I guess parents who hire a tutor for a 4yo aren't going to be keen on tv-watching! Anyway, we've been watching it and that's spurred her on to want to learn more about how cheese is made.
OMG, the more I think about this, the more I can't get my head around people wanting their chidlren to have private tutors to learn about history and geography when they're FOUR!!! It's madness! Poor child He's going to be completely put off it all. Why not get them reading some stuff by John Holt so they can understand how children really learn?
Anyway, that doesn't help you. What about castles and knights for history? That's always fun. Not sure what you could do with a 4yo about it though? Make a playdough castle?
What about making some victorian toys?
OMG, poor boy He should just be playing all day long at this age!