 Unexpected success led to an indefinite extension of the programme and appearance of regional branches.Since 1978 Mladý Svět adopted it under name "Holidays with Brontosaurus" ("Prázdniny s Brontosaurem"), massively adding to its popularity.In the same year Brontosaurus had to become a collective member of Socialist Union of Youth, a pro-regime political organization aiming to completely cater the youth population.