Design each English letter as a modular mechanical structure: capital letters are composed of standard components such as universal pins, shafts, beams, gears, etc. Children assemble A-Z one by one like engineers, understanding the letter skeleton, symmetry, and proportion while assembling. After completion, it can be connected into a whole "letter conveyor belt" with a hand crank, and all letters will rotate or rise and fall synchronously, dynamically demonstrating "living English". The teacher displays the finished letter chain, and the students record the movement of each letter. Two people in a group remove the letter M in reverse and analyze the structure of "slant support beam". Form the word "MOVE" with the spelled letters and synchronize the entire chain to complete the project presentation.