The authorities in Vitoria da Conquista, Bahia state, call the microchipped T-shirts "intelligent uniforms".
BBC: Brazilian schools microchip T-shirts to cut truancy
2.
The authorities in Vitoria da Conquista say the T-shirts can be washed and ironed without damaging the chips.
BBC: Brazilian schools microchip T-shirts to cut truancy
3.
The video is understood to show Mr Landeros stencilling an image of a bullfighter, a bull and the word 'conquista' - the Spanish word for conquest - on Picasso's 1932 work Woman in a Red Armchair.