The Oriental Trading DIY Steam Kaleidoscope Kit is engineered for learning fun. Teach kids basic STEM skills while letting their creativity shine. This kit teaches them basic concepts about light reflection and engineering. Students can decorate the tube and then they will get to building. Includes cardboard craft rolls, paper pieces, paper straws, cardstock pieces and mylar strips. Made from cardboard/paper material. Size: 3-3/4-inch x 5-1/4-inch. Come in pack of 10 pieces.