Suggestions for holiday gifts for young boys'?

I've got a 3 and a half year old and a 5 year old boy who are going to get a lot of presents this year for the holidays. Typically, I order a lot of things for them online, etc from Toys are Us & Amazon.

This year, I thought I'd ask some suggestions for holiday gifts for my young sons' since there hasn't been any buzz about a clear winner for them other than the usual stuff, Geotrax, magnetix, etc, which they have as well as duplo, legos, and all the usual stuff. What do you get for kids who have (almost) everything already? Something unique, interesting, and ideally fun.

Thanks for answering my question earlier! Depending on how much you want to spend, we have a variety of stuff. I'm a nanny for a 3yr old girl and 5 yr old boy. I have been delegated to be santa. Power wheels has made a jeep thing with a trailer on the back(perfect for the little one!). Grant(the boy) drove it around toys'r'us for about an hour with his sister in the back. It was super cute. Colorwonder fingerpaints are my other big thing. The kids love to paint, and these are a colorless gell that magically changes when it hits the special paper. I played with it for about an hour! Your right about those magnetix...thyre really fun, especially the ones that glow!have fun!