Answer:
If you drop me I'm sure to crack but give me a smile and I'll always smile back. What am I?
The letter S is added to pluralise most words in the English language. eg. Letter to Letters Word to Words and Language to Languages. But I am a word that is pluralised with the addition of the letter C.
Send poorly behaved children to me and let them sit here. What am I?
I go around in circles but always straight ahead never complain no matter where I am led. What am I?
I'm a word that is not even strange. What am I?
I am your mother's brother's only brother in law. Who am I?