Hi
"The Works " shops have some good , well priced books.
Skywatcher make some reasonable priced quality scopes, have a look on their website. Might be wise to look at one of their refractors - startravel 80 (£149) , Evostar 90 (£159), Mercury 707, mercury 705 and Capricorn 70 (all 3 under £100).
There are some nice reflector (mirror) teles but you have to keep ligning the mirrors up which he might not want to do at 10 years.
Good luck and I hope he enjoys whichever you get him
neil