12 is definitely too old for Caillou. Thankfully for me, my kids were a little too old to pay attention to Caillou when it started screening here, but it was one of those shows, like Daniel Tiger that got put on high rotation by our national broadcaster. Seemed like every time we turned on the kids channel it was Caillou, or Daniel Tiger or Peppa Pig. My kids were really into Dora the Explorer. The best thing about that was that the DVD's went for 30 mins each so we could stick them in front of the tv and know we had 30 min blocks to get things done.
NP: Helloween - Rabbit Dont Come Easy