S.K.
Hi N.,
Games and science kits are good for boys 9 years old and up. There are some really cool science kits where you can even blow things up. I know that is right up my son's alley and he is 11.
I operate an online retail store and I created a Holiday Gift Guide with picks for kids, divided by age to make it easy for savvy aunts and grandmas to shop. I'm certainly not pushing you to buy anything from me but the list might give you some inspiration. Here's the link to the picks for Boys 7 years old and up. http://www.chocolatecakeclub.com/boys7yearsold1.html
I hope it helps you with some ideas.
S. Kirchner