It's been a bit quiet here on my blog and one of the reasons was that we took a short trip (4 nights) to Barcelona recently. My husband and I had both been to Barcelona before, but this was the first time for the four of us, and also the first vacation where we only visited one city with our kids (4 and 6 years old now).
We stayed at an AirBnB apartment in the old part of the city, which was really nice: we could walk to many of the sites and were close to public transport. Also, having an apartment meant that we could cook at home when we didn't feel like going out for dinner (although dinner with kids was quite painless at the restaurants we went to). In the days we were there we went to Park Guell (but book ahead if you want to go inside!), we took the cable car up Montjuic hill, we walked around the old part of the city, we went to the beach and we went to see the Sagrada Familia (also make sure you book ahead!). A big plus of Barcelona compared to some other cities is the great abundance of little playgrounds. Nearly every square has one and if you're lucky they are situated close to a terrace for a drink. What was nice about that is that even when our kids didn't feel like seeing sites any longer (BlueEyes' comment at the Sagrada Familia:"Oh man, ANOTHER church?!"), we could promise them a playground when we were done.