The child in the middle of the frame has found a funnel and tube that is a loose part as part of the provision for this funnel and tube apparatus. She has set the end without the funnel into a measuring cup. She tries to pour water into the funnel with the funnel facing away from her. That does not work so she turns the tube around so the funnel is now facing her. If you notice that is not so easy because it throws the balance off for the measuring cup she want to pour into. It becomes a balance act of all the parts when she reaches down into the table to scoop some water. Even though the measuring cup is tilted, she is able to keep everything in balance and to pour water into the funnel. Well, not all of the water goes in the funnel, but some does. As she finishes pouring, she pulls up on the tube and the rest of the water in the funnel goes into the measuring cup. As she does this, the measuring cup resting in the table is set aright. She puts the funnel and tube down and picks up the measuring cup. Proudly she says: "See. I poured some water from there into here." She now has the measuring cup at eye level and asks: "How much water is there?"