The pen held up and a finger on the sheet

The index finger rests on the rim of the open sheet. The pen stays in the other hand and does not touch the sheet. The boy in the black shirt looks at the rim. The smaller one, in a white polo, lifts his face. The girl in pink sits on a white chair and holds the stick. Behind the column, a woman in a yellow polo holds a white cylinder. A woman in pink stands at the right edge.