Dissolve 1/4 cup whole cane sugar (use organic as the chemicals in conventional can hurt the grains) in half a quart of hot water.
Once dissolved add 1 1/2 cups cold water. make sure to leave an inch of space at the top of the container.
Take about 3 Tbsp of kefir grains and place them in a quart of the sugar water solution.
Place it out on the counter or in a cupboard covered with a cloth tied on with a rubberband.
Let culture, or sit out on the counter, for 24-48 hours.
Strain kefir grains out and place them in a new sugar water solution and pour the kefir water into a clean jar.
Now you can either flavor the kefir water by putting some fresh fruit in it and letting it culture for another 24 hours, or you can drink as is. (some folks even add in a washed egg shell for added calcium but I have yet to try that)
Please note that sugar content will be greatly reduced after fermentation!