Animal symmetry

If we take a look at these two animals, we can see that both of them are symmetrical, but in a different way. The butterfly has a bilateral symmetry, that means that if we divide it into two halves, both are equal. Whereas in the starfish we can see that there is a different symmetry, a radial one, that means that if we divided the starfish from its centre we can observe that it can be divided into five equal parts. 

The second symmetry can be a bit more difficult to see, but it is a challenge that students would like because it is very interesting to see and differentiate them. Moreover, they can try to work with different radial symmetries, not only with five radiuses, also with three, four, or more than five. To achieve that they would have to fold a paper the number of times according to the number of radiuses they want.

Moreover, it helps children to work with a spatial dimension that sometimes can be difficult for them, and this is a good way to do it.