A colorful educational illustration for young children. A female teacher in her 30s is kneeling or squatting in front of a group of children aged 4 to 5 years old. The children are sitting in a semicircle, watching her explain something with her hands. In front of her, a clear plastic basin filled with water. Inside the basin, a yellow plastic duck is floating, and a metal key is at the bottom. Under the floating duck, a large translucent blue hand made of water gently pushes the duck upwards — symbolizing the buoyant force. The classroom is warm and colorful, with toys and posters in the background. No text. Style: educational, illustrated, colorful, child-friendly. See more