bler, they are worried about yahoo's acquisition may make it uncool. item bler is a blog tumbler is a blog site. yahoo is doing its best to reinvent itself after being left in the dust by google. in that quest, it's agreed to buy tumbler for $1.1 billion. it will give them access to the younger user base. translation, carol, ad dollars. >> ad dollars. i just find this young man's story fascinating. so he's a teenager when he creates tumbler. he is living with his parents as normal teenagers do. tell us more about him. >> reporter: yeah, his name is david carp. as you said, he dropped out of high school. this isn't your typical high school dropouts. he left one of the best high schools to be home schooled. he began learning webcote code