Ambient learning in the shower while listening to music?
I guess that we all like things that are different, especially when they are also useful… The good folks at [gizmodo](http://us.gizmodo.com/) recently mentioned two such things that got my immediate interest:
- a shower that makes the water light up to indicate the temperature: blue water is cold, red water is hot;
- an i-shirt with a magnetic fixture for an iPod shuffle.
Where are the ambient learning applications that are as playful, useful and obvious to use?