28 3D Puzzle sets comprised of 3D puzzles and educational materials in the field of history, science, and nature
The mark consists of a stylized word "3D" in sky blue to the left of the word "STEM" in dard blue which is over the word "puzzle" in red. THREE D STEM PUZZLE The color(s) sky blue, dard blue and red is/are claimed as a feature of the mark. "PUZZLE"