(two players) This simple game is also known as Tit-Tat-Toe and Naughts and Crosses. Draw two lines down and two lines across to make nine spaces. One player uses an X to mark spaces. The other…
When you were born, your skeleton was already inside you. However, there are creatures in the sea that are born without skeletons—so they make their own. But their skeletons are on the outside! …
Are your shoes made of leather? Is your sweater made of wool? Are your glasses really glass? Maybe—and maybe not. Any of these things could be plastics. But what are plastics? They don’t grow as…
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