Barbie On Instagram: Tumblr Challenge is a Dress Up game. You can play Barbie On Instagram: Tumblr Challenge in your browser for free. Hey Girls! Barbie recently started using Instagram and Tumblr. She loves discovering new outfit ideas and Tumblr is her nr. 1 source of inspiration when it comes about fashion! In this Barbie On Instagram: Tumblr Challenge game she has decided to recreate some outfits that she seen on Tumblr, but she would like some help. Are you up for this challenge? Help lovely Barbie choose the best outfit!