The vocabulary is restricted and simple – ‘piping', ‘happy', ‘merry', ‘pleasant', ‘glee', ‘laughing', ‘joy'. This simplicity is heightened by repetition of a few words – ‘pipe', ‘piper', ‘piping', ‘chear', ‘happy'. This all suggests an experience of simple, unalloyed happiness. Nothing negative is allowed to darken the atmosphere. It establishes the voice of the poem as that of a child