Happy ANAND CHATURTHI !  
Lord Ganesha
original visualisation by Artist Mona Joy
On the story below 
Story of Lord Ganesha 
It's said that Lord Ganesha's mother, Goddess Parvati, carved an idol of a boy out of turmeric powder and breathed life into it, unbeknownst to her husband, Lord Shiva. So, when Ganesha denied Lord Shiva entry into his abode--because Goddess Parvati was bathing inside--Shiva decapitated Ganesha's head in anger.
According to legend, an elephant was the first animal that Lord Brahma later found when he went out to look for one (to replace Ganesha's head).