Answer:
I am merry creature in pleasant time of year as in but certain seasons I sing that you can hear; And yet I'm made a by-word A very perfect mock; Compared to foolish persons And silliest of all folk.
What is so fragile that saying its name breaks it?
I rise and fall no matter what, only at finals rest do I not budge. What am I?
From house to house I go, sometimes narrow, sometimes wide. Whether there's rain or snow, I always stay outside. What am I?
I have a little pool with two layers of wall around it. One white and soft and the other dark and hard. What am I?
Long and slinky like a trout, never sings till it's guts come out.