david kkarp is here founder and c.e.o. of tumblr. in 2007 he started the company in age 20. it is now the preeminent blogging company with 3 million active users. "forbes" magazined noted it facebook is the internet's phone book, twitter its wire service and tumblr's karp has build the web's canvas. yahoo! announces-- announced it would purchase it for 1.1 billion. i'm pleased to have david karp at this table for the first time. welcome. great to you have here. >> thank you so much for having me. >> rose: how much time was there between the idea that that is what i can create and the ability to create it? that canvas. >> probably took me a few months. and it was just working on my own blog. i was working on a little tool just for me. and at some point along the way it clicked for me like now, there might be some other people out there who have the same frustrations that i do. and look when we launched the thing we found some of them it wasn't like 100 million of them it was like a few thousand of them that showed up and were just as excited as we were. and a few thousand tur

david kkarp is here founder and c.e.o. of tumblr. in 2007 he started the company in age 20. it is now the preeminent blogging company with 3 million active users. "forbes" magazined noted it facebook is the internet's phone book, twitter its wire service and tumblr's karp has build the web's canvas. yahoo! announces-- announced it would purchase it for 1.1 billion. i'm pleased to have david karp at this table for the first time. welcome. great to you have here. >> thank you so much for having me. >> rose: how much time was there between the idea that that is what i can create and the ability to create it? that canvas. >> probably took me a few months. and it was just working on my own blog. i was working on a little tool just for me. and at some point along the way it clicked for me like now, there might be some other people out there who have the same frustrations that i do. and look when we launched the thing we found some of them it wasn't like 100 million of them it was like a few thousand of them that showed up and were just as excited as we were. and a few thousand tur