Let it rain

Little drops of rain decided not to walk a lot, and when they had to return back to the cloud that would water the flowers, they got into trouble, and they need to be sure to come back, because without them there is no rain, and then all life is withered from the heat! You'll save all the drops and send them back to the cloud that they watered plants rain! Will not always be easy to solve the problem for the release, but you should do it!