I'm still weighing whether I'm going to get the bambinoLUK (the 3 - 5 year old version) for the girlies...I'm still in the "I must follow The Well Trained Mind exactly as written" stage of homeschool research and preparation, and I don't think these fit into the grammar stage model of learning. I bet I'll soften on this soon enough.
Click here to visit the manufacturer's website: beyond123.
The best prices I found were at Timberdoodle. They aren't expensive, but not dirt cheap. There is a more-advanced controller system (miniLUK) with more tiles that can be used from age 5 through probably high school. Some of those puzzles are really, really tough.