Festa Junina has its roots in old harvest festivals brought to Brazil from Europe hundreds of years ago, but it has become something totally Brazilian over time. Today, it is the second-biggest festival in the country after Carnaval - and it is much more focused on children and families.
At school festas, kids wear country-style outfits: chequered shirts, straw hats, dungarees, painted freckles. There are stalls selling all kinds of foods made from corn (which is in season in June in Brazil): boiled sweetcorn on the cob, popcorn, sweet corn cake, and a thick warm corn drink called canjica.
The big event is the quadrilha - a group dance where pairs of children line up in two rows and follow shouted instructions from a caller, like a country dance. Steps include twirling each other under raised arms, swapping partners, and forming arches with linked hands. It can look chaotic but it always ends with everyone laughing.
In the north-east of Brazil, Festa Junina is enormous. Whole towns put on huge outdoor parties with stages, music and costume competitions. In other parts of the country, it might just be a single afternoon at school - but everyone knows the same dances and eats the same foods.