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Science at Home
How Can We Make a Pine Cone Open and Close?
In this experiment, we’ll make a pine cone open and close as we wish. Equipment Pine cone
October 13, 2014 זמן קריאה משוער 7 -
riddles & quizzes
Mathematical Models of Forests
Forests are very important. They create oxygen, filter the air, provide shade and prevent
April 26, 2014 זמן קריאה משוער 7
