Answer:
I am heavy forward, but backward I'm not. What am I?
You kick me, you punch me, and you beat me up all class. When you leave, you don't even say thanks for allowing you to beat me up. What am I?
Everyone has me and no one can lose me. What am I?
I am not very commonly found! Only in some rainforest! I have an odd number of toes! I'm very lazy and hang upside down! What am I?
Drop me and the world will shatter. You can always find me where you empty your bladder. What am I?
In your fire you hear me scream! Creaking and whining yet I am dead before you lay me in your hearth.