Lullabies: Why They Work, and What to Sing If You Can't Sing

Babies and toddlers are not evaluating your pitch. What they respond to is a familiar voice, close by, at low volume, doing something predictable — which is exactly the same set of cues that make a familiar story work at bedtime. A shaky rendition from you does more than a flawless recording by a stranger, because the point isn't the music.

If singing genuinely isn't for you, humming works. So does saying the words slowly and softly instead of singing them. So does reading a story with a lot of repetition in it — that rhythm is doing a similar job.

• Slow — slower than you'd naturally sing it, and slowing down further as you go.
• Repetitive, with a small number of lines that come back around.
• Quiet, and getting quieter. Trailing off is a feature.
• Short enough that you can repeat it, rather than long enough to hold attention.
• The same one, night after night. The familiarity is most of the effect.

Classic lullabies — the traditional ones you half-remember from your own childhood — score well on all of these, which is why they survived. Your child doesn't care that it's old.

The most useful place for a lullaby is at the very end: after the story, lights already low, as the last thing that happens before you leave. That makes it the signal, not the entertainment. If a song is the fun part of the evening, it wakes them up; if it's the closing ritual, it settles them.

Some families sing; some read; plenty do both, story then song. MoonPage covers the story half — original illustrated bedtime stories, narrated or recorded in your own voice — and the song at the end is yours.