Musical Ear Prismatic silhouette 11 months 3 Musical Ear Type II Prismatic silhouette 11 months 0 Treble clef flower and bird silhouette about 1 year 4 Music silhouette about 1 year 3 Bass silhouette about 1 year 2 Music silhouette about 1 year 3 Treble clef silhouette about 1 year 3 Clef silhouette about 1 year 1 Clef silhouette about 1 year 1 Clef silhouette about 1 year 2 Clef silhouette about 1 year 1 Treble Clef silhouette almost 4 years 28 Treble Clefs silhouette almost 4 years 32 Treble Clefs silhouette almost 4 years 28