According to which theorist 'cultural tools' play an important role in cognitive development of children?

Vygotsky's sociocultural theory emphasizes that cognitive development is mediated by cultural tools such as language, symbols, and artifacts transmitted through social interaction. Piaget focused on individual constructivism through interaction with the physical environment. Bandura's social learning theory emphasizes observation and imitation. Skinner focused on operant conditioning. The concept of 'cultural tools' is distinctly Vygotskian.