When you get a quart chick waterer filled and put marbles or pebbles in there to keep it from falling asleep in the water and drowning, you just dip its little beak in the water. It will catch on.
And, justino, when several experienced people tell you the answer to your question, LISTEN to them and stop challenging everything they tell you. 95 degrees right under the light the first week is what you want, not 100, plus enough room for it to wander around out from under the light if it gets too hot. That's the last word on it. Not 100, not 101, not 98.5. You can bank on it when Tuff or Katy or someone who has been raising chicks for years and years tells you that, I promise.