Cook! The trademark of many countries is their food. Why not try making the national dish of the country you want to visit the most? Did you know that the national dish of Peru is called Ceviche, which is a raw fish marinated in spices and lime. The current (highly-debated) national dish of the UK is Chicken Tikka Masala, which is a British take on a South Asian dish. You can learn a lot about the culture of countries by learning about the food they eat.
Make Art. The world is full of so many colourful and interesting things and the biggest source of inspiration for the artists among us. You could make some art with geography, culture, and nature in mind. E.g. Create your own map of the world, draw pictures of animals from different continents, do some research about art from different cultures.
Challenge: Try to memorise all the countries of the world and place them on the map. Bonus points if you can match all the countries with their flags as well!