boys caps children class color colored colorful colors colour coloured colourful colours excursion experience fun girls group kids kindergarten learning market outfits outing school shorts Singapore teachers together tops uniforms academic-institution backwall beams benches between-classes brown building classroom corrugated-iron corrugations covered decorated decorations design designed desks doors education furniture ground-floor interior light lines open open-space pillars posts property pupils roof roofing room school-uniforms seating shelter steps students whiteboard windows wood