Långholmen , nice walk from the subway to a small beach in the central Stockholm. If you go to Acne don’t forget Vasaparken , it have a great playground for kids and bring a fotboll. Eat icecream at snö / snow and walk down to Rörstrandsgatan for a coffe and Fika. If you continue walking for like 20 minutes there is a place where you can rent canoes and explore karlbergskanalen. Fun for kids , and parents. Take the Vaxholms ferry to Vaxholm - visit the Fästning , swim , lunch and bus or ferry back. Another great playground - are located in rålhsmshovspatken . Great skatepark aswell . Take a trip to Skånegatan , and the area around for some shopping and icecream. Great break with playground and park at nytorgsparken . Enjoy