Cozy and Sunny room near park Güell

We are a 36-year-old couple with two little ones, Max and Nil, ages 7 and 4. We are a family who loves sports, nature, and discovering new places whenever we can. We are from Barcelona and live in a very bright apartment with a large terrace overlooking Barcelona, which we are slowly renovating with great enthusiasm. We are a quiet family without great expectations. My wife, Julia, is a history teacher at a high school, and I work as a maintenance worker at the Conciliar Seminary in Barcelona. For now, we have a spare room that we want to use for students so we can learn about other cultures and also show how a normal family lives in Barcelona. The room has air conditioning for those hot Barcelona nights in the summer and heating in the winter!