Okay so I love this thing. It is very accurate, I don't have to wake them to take it and they don't mind it if they are awake. Simple.
These work so well that I have taken them myself. The best part is they look like little nerds and taste good. Again, simple.
I love playing this game with the kids. Its kind of nice playing a game that isn't so repetitive and boring everyone can enjoy. Plus...they are using their language skills and they love when you look silly!