I need an honest answer - Egypt

I’m planning to do a day trip to see the pyramids with my 4yr old boy. We will arrive in Cairo around 7:30am or 9:30am depending on which flight we get from Hurghada. We will then be heading straight to Giza to have breakfast/lunch at 9 pyramids lounge. After that we’d go and see the pyramids and maybe have a camel ride then go to The Grand Egyptian Museum.

I was thinking to do it on my own, no tour guide. Just pay as I go along. I feel like my son will get tired and bored after looking at numerous amounts of sight seeing.

My question is: do you think it will be a waste of journey? Has anyone been in my situation before that’s been to see the pyramids? What would you recommend if you was in my position?