A series of 5 short riddles which require minimal pre-teaching of vocabulary especially at a post-beginner level. You can quickly write one up on the board and have students come up with possible solutions. My students absolutely love them!
Adedonha is a very nice game from Brazil and it's pretty nice to use it in a lesson. Here I wrote some examples of it and in the exercise you have the instructions. You can explore the exercise as much as you want and ask students to speak using their answers.