I found the only one thing to do in Jakarta, it's Kidzania! They have this lovely world in many countries not just in Indonesia.
It's just something! If you have a child 4 years old or older it's the best place to visit, might be better than DisneyLand. It's a huge place, city, with different stores, factories, a police station, hospital, taxi, buses, so lot's of place where kids could try some... job! They can work as doctors, firemen, conditers, they can make food, they can work on TV or radio, they even get paid and can spend money in the local store. The best age to visit is about 8 years, I reckon, because each activity has it's own age limits. Eva was able to join just 4 rooms. Each session is 20 mins.
Spot playgrounds, kids friendly cafes and other around the world using SpotPlaySay app for iPhone
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