Mine have been going for about a week now. Look how great this is!
Note on the lettuce: you can see that only one of them is growing. I guess you have to leave a couple of baby leaves on for this to work.

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Sunshiine
This is even better than throwing your veggies in the compost heap and getting new veggies as a result because you can SEE it happening. Gonna' try this. Wonder if the kittens will leave it in the water?
sunshiine
But do you have sweet taters and rutabaga? :-D
I wonder if Garlic scapes will grow this way.