Family Home Evening is a good time to discover the compelling wisdom regarding sleep found in Doctrine and Covenants 88:124. I suggest reading that verse and the July 2015 article at lds.org titled “Filled with Life and Energy” by Randal A. Wright. Next, counsel together about how your family can help each other to follow D&C’s direction as much as possible, given your individual situations.
I also offer this lively song. The first verse is meant to be sung in the morning, when sleepy bodies long to stay in bed. The second is for nighttime, when, as so often happens, little bodies want nothing to do with bedtime.