Answer:
Take off my skin I won't cry but you will.
Forward I am heavy backward I am not. What am I?
You cannot keep me until you have given me. What am I?
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.
I always murmur but never talk. Always run but never walk. I have a bed but never sleep, have a mouth but never speak. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.