It's my favorite poem too! I love Shel Silverstein.LISTEN TO THE MUSTN'TS - Shel SilversteinListen to the MUSTN'TS, child, Listen to the DON'TS Listen to the SHOULDN'TS The IMPOSSIBLES, the WON'TS Listen to the NEVER HAVES Then listen close to me— Anything can happen, child, ANYTHING can be.