You need to be specific, because I have no clue what you're talking about.
I'm sure babies mean sprouts or seedlings of a plant.
Make sure you have enough lighting, I think its about 70w or so of CFL or so per one square foot of grow space, make sure its not too hot or too cold (keep temps between mid 70's and mid 80's), and dont overwater. Only water when the dirt is dry, although the top soil may be wet, marijuana root system's are elaborate and fast growing and can easily suck up moisture under the top soil that you dont know is there, overwater could cause early root rot.
Thats just a few things that could be wrong, be a little more specific on what your problem is.
