Classical music or silence
The hypothesis that children who are made to listen to classical music will be able to fall asleep more quickly, is proven to be true.
Most parents have difficulty making children fall a sleep at night. Babies who sleep about 14 hours a day will need to be fed and have diapers changed many times in the night. However, having the proper environment with light music can help a child sleep for a longer period of time by keeping the child calm and feeling secureu.
The experiment can also be repeated using different types of music like lullaby or pop music.
Try to compare the results by repeating the experiment by checking the number of times the children wake up during their nap time.
Using music to help your infant sleep - http://www.thelaboroflove.com/articles/using-music-to-help-your-infant-sleep/
Toddler insomnia – will using music help baby sleep - http://www.articlesbase.com/sleep-articles/toddler-insomnia-will-using-music-help-baby-sleep-1844886.html