Magic Triangle, Math Puzzle

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Given the numbers {1, 2, 3, 4, 5, 6}, arrange them into a triangular pattern so that the sum of the three numbers on each side of the triangle adds up to the same total. The puzzle is known as the "Magic Triangle". Of course, one should also check out the famous magic square. The Magic Triangle is a simple puzzle suitable for kids of all ages, inviting them to think about the basic patterns behind numbers - large vs small, odd vs even, rotation, reflection, and so on. It's not easy but it's fun and mind-opening! There are four related solutions. I posed the problem to a group of young children, who solved them after many trials and errors. I had to use a sheet of many triangles. Now, I think it is just helpful to make a 3D model, to save paper and facilitate explorations. Have fun and enjoy the art of mathematics! Reference: http://www.perimeter-puzzles.net/magic-triangle.htm