a happy mind fill

before I went to college my sisters were just kids talking about stupid things and the petty problems.On saturday when I went out with them I went out with these ladies unknown to me. The whole evening went in understanding their lost mind and their matured understanding. 
Each with a different character but exploring a thought unknown. But then these grown ups brought me back to reality with their silly concerns. 
the second sketch was just an idea on the same lines and has nothing to do with my sisters.
I made these illustrations for the cover of their gadgets.