The series tells the adventures of Gaspar and his friends, Clarinha, Romão, Marta, Farturas and his very special friend Manjerico the hedgehog. Gaspar and his friends like to play with the Professor's inventions and they always have the Serôdio Guard around to patrol what is going on. In the second series, more characters appear, such as Neca, Aunt Felismina, Pitágoras, among others.

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