I love Excite Truck too

It gives me such an adrenaline rush that I have a hard time getting off the couch when I play it for a few hours. It's much faster than even Race Driver GRID.
I just wouldn't advise anyone buying a Wii (unless they really know what they are doing) since everyone I know got bored with their Wii. They tend to react in the way of " Oh, you got your kid a Wii? You should have bought mine". To be honest only my kid plays on it and my GF, who plays Kororinpa and Smooth Moves.
My kid really loves Boom Blox. I tend to only play the game when he is unable to finish a level. He only cannot play the "Jenga" type levels. He tends to knock the whole tower over in no time.
I do think the game is a bit too easy though (which explains why my 5 year old can play it). At first I had to retry a few levels to get a gold medal and there was one that I think I still have only silver on. After you get the hang of it, it does get a bit easy.