In the present workshop, teachers will be presented with activities coming from physics and astronomy. These activities address mainly children of preschool and elementary grades and constitute examples, based on which, teachers can develop equivalent activities with topics coming from other fields of science. The presentation will touch upon issues such as activities’ learning objectives, the activities’ process, the science process skills used, as well as methodological suggestions and approaches to learning.  We will also present classroom experiences coming recorded by the six early-years-teachers who implemented the activities with 104 children lessons. Lastly, in the present workshop, we will describe briefly the approach to the development of the activities and make reference to the contribution of ‘action research’ to adapting activities to the necessities of the classroom.