The video shows a child sitting on the floor with a wooden track in front of him. The track is made of wooden blocks and is shaped like a bridge. The child is using a ruler to measure the length of the bridge. The child's hands are visible in the video, and he is wearing a gray shirt. The wooden blocks are light brown, and the ruler is yellow with black markings. The child's actions are deliberate and careful as he measures the length of the bridge.