The three large windows in the sanctuary represent the three persons of the Trinity – Father, Son, and Holy Spirit.
The smaller window in the front left corner of the sanctuary represents Matthew 18:16 –"Let the children come to me, and do not hinder them, for to such belongs the kingdom of God."
The smaller window in the front right corner of the sanctuary represents music, specifically Psalm 150:3-5:
3 Praise him with trumpet sound;
praise him with lute and harp!
4 Praise him with tambourine and dance;
praise him with strings and pipe!
5 Praise him with sounding cymbals;
praise him with loud clashing cymbals!