In the video, two children are seen playing with a toy fish tank. The tank is filled with water and has various colorful fish and sea creatures inside. The children are leaning over the tank, watching the fish swim around. One of the children is pointing at a particular fish, while the other is looking at the tank. The fish are of different sizes and colors, including blue, yellow, and pink. The tank appears to be made of clear plastic, allowing the children to see the fish clearly. The children seem to be enjoying the activity, and the fish are swimming around calmly.