UNO but with letters not numbers. It can be used at lower levels to practice colours and letters. It can also be adapted for slightly more advanced learners by asking the children to say a word beginning with the letter on the card when it's their turn. Sometimes I allocated a part of speech to a colour, for example yellow would be adjectives and blue would be verbs and so on. When a child puts down a yellow card with the letter B on it they could say big or beautiful etc.