Describing figures and visualizing what they look like when they are transformed through rotations or flips or are put together or taken apart in different ways are important aspects of geometry in the lower grades. In this two-part tangram activity, students can work with either tangram pieces or the provided tangram applet. In the first activity, Tangram Puzzles, students can choose a picture and then use all seven tangram pieces to fill in the outline. In the second activity, Tangram Challenges, students are challenged to make a variety of polygons with a specified number and type of tangram pieces. Instructions for using the applet are included. (author/sw/js)