Sadly the almond milk kefir was a bust. So I tried out apple juice kefir instead and boy#1 has declared it delicious. I agree - not as sweet as apple juice (which I find too sweet) and slightly acid and fizzy. A great replacement for Appletizer (which I have a serious weakness for!) and a strong probiotic to boot. Instructions are again fantastically easy to follow.
1 cup apple juice
Rinse the grains thoroughly in filtered water to remove all traces of milk. You might want to make a couple of batches in juice before trying it out with dairy sensitive folk (who may still react but many don't apparently so it could be worth a try). Add the grains to the juice in a clean jar and leave in a cupboard overnight. Strain out the grains. You can either drink the kefir now, or put into a jar and refrigerate. I did this for a few hours and it made the drink fizzier.