Wales,
You have got to get your image reduced down to less than 80k before you can post it. Apparently there are web sites that will do this and store your images for you, but you would have to ask some one else about them as I have no knowledge.
I use a programme called microsoft picture it, it is just a small photo edit programme, I am sure you can download it or another like it free on the internet, It enables me to crop photo's reduce them in size and other things like that and its easy to use.
Get your son to look on the web for something.
Phil