Sets still in boxes sitting in the cupboard:
8466: 4x4 Off Roader
8455: Backhoe Loader
8439: Front End Loader
8265: Front Loader
8043: Motorized Excavator
8110: Unimog U400
9396: Helicopter
9398: 4x4 Crawler
42006: Excavator
41999: 4x4 Crawler Limited Edition
42009: Mobile Crane MK II
My almost six year old son has been a `LEGO junkie' for a couple of years now. More recently he's shown lots of interest in mechanical things, e.g., how gears and pulleys work, so I unpacked a couple of my old LEGO sets from when I was a kid. Junior and daddy had fun building the 854 Go-Kart and 853 Auto Chassis together so I picked up some more studded Technic sets from my `Dark Ages' for us to build. We're currently constructing the 8868 Airtech Claw Rig ("Air pumps are super cool!" according to junior) and the 8880: Super Car is the next set in the build queue. Earlier this year I started keeping an eye out for more recent studless sets that I thought would appeal to my son (who likes construction machinery, helicopters and trucks) and myself. Since then I've bought the sets above (generally at sales, on BrickLink or by keeping a patient eye on eBay) and they are stashed in the cupboard for building together in the future. By my standards that's a significant amount of money tied up in little plastic pieces but my son and I have fun playing with LEGO together and my wife and I now have lots of future presents in hand.