How old are children when they enter primary educa

And what is the duration of higher education in Belgium?

The schematic diagrams on 'the structure of the European education systems 2012/13' give a quick answer to these questions. They show the structure of mainstream schooling in 39 education systems, from pre-primary level up to tertiary education. The diagrams cover the different education levels, the various age-groups at which pupils officially start schooling and the duration of studies at each level. Names of institutions and study programmes are listed in the national language of each country. The education systems of the 34 countries in the Eurydice Network (EU Member States, EFTA countries, Croatia, Serbia and Turkey) are included.
If you want more detailed information: Eurypedia is a unique website presenting the most comprehensive and accurate picture of education systems and reforms in Europe.