21 years old
Of all the promising players Marc Bartra is probably my favourite. With his good looks and unquestionable talent he has often been branded as the new Gerard Pique. Bartra transfered to La Masia in the age of 11 from their local rival Espanyol. He made his debut in the first team in 2010 and has played there 7 times since then. Despite his few appearances in the first team he is still very much Barca B's player, but with his talent I'm sure we'll be seeing him in the first team more soon.
18 years old
Gerard Deulofeu is definitely one of the most talented Barca B players. Many people expect him to one day become the new Lionel Messi. Deulofeu joined La Masia when he was 9 years old and has played in the Blaugrana shirt ever since. He made his debut in the first team in 2011 at the young age of 17. So far he hasn't played more games in the "big" team, but I'm sure some day he will. With his amazing talent he is already relatively well-known considering his young age. Gerard has always been one of the most talented kids and therefore he is well aware of his talent. Some football experts have called him even too confident and said that he will be a fantastic player if he'll only stop thinking that he's already the best.
19 years old
Rafael Alcantara has at least the last name of a football star. As the younger brother of Barca's Thiago Alcantara he's eagerly expected to play next to his older sibling. Like Thiago he was born in Sao Paolo, Brazil and joined Barca's youth system at the age of 13. He has represented both Spain and Brazil in the national team and hasn't yet decided which team he'll choose in the men's team. He hasn't yet made his debut in FC Barcelona's first team, but with his unarguable talent I'm sure he will soon.