Science education become one prioritie of modern societies, with the purpose of forming scientifically literate youth and adults. They play an active role in solving the problems existing in society, making critical and informed decisions. In this paper we discuss the need for scientifically literate citizens and the relevance of practical work as a key strategy for science learning in the early years. We'll describe the investigative process which supported in real-life educational contexts of a set of Didactic Strategies. We'll focus on the results of the 'Materials Lotto' detailing the results in science teaching and learning in kindergarten. The results show that children mobilize a wide array of skills and attitudes/beliefs, showing scientific knowledge at different degrees of complexity. We concluded that practical work in science education in the early years is an effective strategy for science teaching and learning, as groundwork for future science literacy of kindergarten children.