As the teacher gives the instructions and demonstrates the techniques, the participants work earnestly, and though their creations aren't as refined as those of a trained professional, at least they're in the ballpark.
老師一個口令、一個動作的帶領，大家認真地「上美勞課」，雖然折疊出來的成果不若訓練有素的工作人員，但至少都有三分樣。