Three primary school children working with construction toy in classroom, close up, low angle

indoors day three people boys girl pre-teens caucasian black african american ethnicity multi-ethnic group kids children pupils schoolchildren schoolboys schoolgirl school kids standing leaning working together teamwork learning looking down concentrating constructing communication bonding togetherness friends friendship classmates education discovery elementary school primary school classroom knowledge interested attention building blocks construction blocks educational toys instructions school uniform waist up close up low angle focus on foreground slow motion handheld