Ufli (also known as Universal Flying Lessons) is a fictional concept, so there are no specific lessons designed for grades 1, 2, and 3. However, if we were to create a curriculum for Ufli lessons for these grades, it could include the following:

Grade 1: 1. Introduction to Ufli: Teach students about the concept of flying, different types of flying objects, and the basic principles of flight. 2. Paper Airplanes: Engage students in hands-on activities where they learn to fold and fly paper airplanes, experimenting with different designs and understanding the factors that affect flight. 3. Kite Making: Teach students how to make simple kites using basic materials, and let them experience the joy of flying their own creations. 4. Bird Watching: Introduce students to different types of birds and their flying abilities. Take them on a nature walk to observe birds in their natural habitat.

Grade 2: 1. Forces of Flight: Teach students about the four forces of flight (lift, weight, thrust, and drag) and how they affect flying objects. 2. Hot Air Balloons: Introduce the concept of hot air balloons and their mechanism of flight. Conduct experiments with hot air balloons to demonstrate the principles of buoyancy. 3. Gliders: Engage students in building and flying gliders made from various materials, allowing them to explore the concepts of lift and aerodynamics. 4. Aviation Pioneers: Introduce students to famous aviators and their contributions to the field of flight. Encourage them to research and present on their favorite aviator.

Grade 3: 1. Aerodynamics: Teach students about the principles of aerodynamics, including the shape of wings, airfoil, and the Bernoulli’s principle. 2. Model Rockets: Engage students in building and launching model rockets, allowing them to understand the principles of thrust and propulsion. 3. Parachutes: Teach students about the concept of parachutes and their role in slowing down the descent of objects. Conduct experiments with different parachute designs. 4. Flight Simulation: Introduce students to flight simulators or online flight games to give them a virtual experience of flying and understanding the controls of an aircraft.

Remember, these are just hypothetical lessons based on the concept of Ufli. In reality, the curriculum for grades 1, 2, and 3 would focus on other subjects and may not include specific lessons on flying.