How many movies have Leonid Sikoruk and Viktor Vatolin collaborated on?

They have worked on 7 movies together! Their first movie together was Физика в забавах. 3 Выпуск (1971) and was their highest rated movie together. They have not worked together since Загадки звёздного неба: Откуда взялись телескопы (1985). They are most known for their family films together.