My son's favourite Bubble Tea is the classic Pearl Bubble Tea 珍珠奶茶 zhēn zhū nǎi chá. It is simply shaken milk tea with tapioca pearls. As a treat he is allowed to have one if he is able to order it in Mandarin Chinese.
Watch this Youtube clip about how to buy Bubble Tea in Mandarin Chinese, including all those confusing questions about the sugar and ice content. Then when you are ready, challenge yourself and head to your nearest Bubble Tea shop (or if you are in the UK click here for your nearest Chatime location) and order one in Mandarin Chinese like a pro.