Escher style Geometric Tessellation Art from Widya Huang's Batari school 4th grade math class in Indonesia

bird head tessellation by a child bird tessellation by an Indonesian elementary school math student bird tessellation by an Indonesian elementary school math student

TWITTER 2030 by Rachel

Rachel's math teacher writes, "Rachel Pasaribu came up with some questions before she did this tessellations. She asked me, 'Ms.Widya, do you think we'll still have Twitter by 2030? If we still do, how much changes will there be? Hm..I wonder if they'd change the logo..'.

When she finally finished this, she told me that she isn't sure we'll still use Twitter by 2030."

I think maybe Rachel's Twitter of 2030 has partnered with "Angry Birds™".

Angry Birds

"Twitter 2030" is a translational (slide) tessellation. You can tell it's a translational tessellation because the birds are all at the same angle and facing the same way-- they're simply copied and then moves along the X axis and Y axis, without spinning or flipping.

Is this a tessellation? Well, if we look at the birds as abstract shapes, then yes, this is a tessellation. However, if we say the shapes are birds, then we have to ask "Where're the birds' bodies?" and "Are those things capes, behind the birds? Maybe these are sock puppets, not real birds? If these are real birds, then where are the little birdy feet?"

See this example from the "Is it a Tessellation?" section of for a clearer explanation of why Rachel' birds make...and don't make...a tessellation.