Tessellation Websites

From a grad class I am taking, I learned about 2 really cool websites for creating tessellations with my students.  One is repperpatterns.org/tool  and the other is http://www.shodor.org/interactivate/activities/Tessellate/.  The 4th and 5th graders created different tessellations with repeating shapes and pattern using these websites,  then we saved a screen shot in a Word file.