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Action songs
Active listening
Attention
Attentiveness
Aural discrimination 

Boys/males (see also Gender)

Categorization
Chanting (see also Speaking and Vocalizing)
Chord changes
Chord progression(s)
Slapping
Cognition
Conservation

Dance/dancing
Descending (intervals and melodies)
Discrimination

Echo/echoing
Emotional Response
Ethnicity
Eye contact

Facial expression
Fetal (see also Unborn)
Form(s)

Girls/females (see also Gender)

Harmony

Imitate/imitation
Infant(s) (see also Newborn)
Instrument identification
Instruments
Intervals
Invented notation

Keyboard (see also Piano)

Listening
Longitudinal studies
Lullabies

Major
March/marching (see also Stepping)
Maturation
Melodic pattern(s)
Melodic perception
Melody
Memory
Minor
Mode
Movement
Music aptitude
Musical environment
Musicality

Newborn (see also Infants)
Notation/note names/note reading

Ostinato

Pattern(s)
Perception
Performance accuracy
Piano (see also Keyboard)
Pictures/picture books
Piece preference
Piece recognition
Pitch direction
Pitch matching
Pitch patterns (see also Pitch set)
Pitch set (see also Pitch patterns)
Preference(s)
Pregnancy (see also Fetal and Unborn)

Range
Reading readiness
Register
Rhythm
Rhythm instrument(s)
Rhythmic discrimination

Sing/singing
Speaking (see also Chanting and Vocalizing)
Spontaneous movement(s)
Steady beat
Stepping (see also Marching)
Syllables

Teacher affect
Text (of songs)
Timbre
Tonality

Vocalizing (see also Chanting and Speaking)