I had one that started with me when she was 14 months .....mom assured me she was simple to put down .... Ya right ..... I tried every room ..... She screamed .... Mom told me she would not give in to tiredness either ..... I had to keep calling dad to pick her up she was just beside herself .... She would pull her pony tail when she was tired and she was damn near ripping it off her head she was so tired .... So mom gave it some thought and the next week she said sent a music machine, and moms pillowcase and she said put her in the darkest room and shut off the light and shut the door and see what happens ..... Bingo !!!!! She slept for 3.5 that day and every day after. Maybe she needs to smell mom!