Beyonce’s six-year-old daughter is already an “amazing artist and creator”. The ‘Texas Hold ‘Em’ hitmaker has 12-year-old Blue Ivy and twins Rumi and Sir with husband Jay-Z and her own mom, Tina Knowles, has revealed the youngest children are very different from one another but have already found their passions in life. Tina gushed to E! News: “Rumi is amazing – an amazing artist, painter and creator. How could they be anything else growing up in that environment? All we talk about is creativity and fashion.” Explaining Sir is more reserved than his sisters, Tina described the boy as “very, ve…