No! If the toddler whimpers in the middle of the night, you must make sure to not give in soon, in fact, it's a good practice to wait for a few minutes to see if she settles down on her. Remember, the kids are rather noisy sleepers, therefore you can expect them to often cry out or make other noises in their sleep in order to return to slumber in a few minutes. Nevertheless, if this continues for quite some time, do check on them to make sure they aren’t sick or are in need of help.