The paper focuses on the role different kinds of context (situational, physical, social, and linguistic) play in the development of infant's language during its individual stages (cooing, babbling, word and sentence formation) and attempts to delineate those contextual factors that the author considers most fruitful in the language acquisition process. Some attention is also paid to the peculiarities of bilingual upbringing such as language games the child himself/herself invents in the context of two languages (Czech vs. English) and calque creation. The paper lists numerous examples and its presentation is accompanied by audio and video material collected during research.