What are your kids hobbies, do they go to clubs...
My 8yo plays rugby, he was very glad to get a rugby ball for Christmas (lost it the other day though), he also goes to Cubs, and will be going to Cub camp in the Summer so I may get him stuff for that e.g. decent torch,camp stuff
My 5yo, never ever really asks or wants anything, he can just make do with paper, staples and pens! However good presents he has had in the past was a V-Tech Kiddie Zoom Camera and a cheap Phillips Touch Screen MP3/4 player.