Reptangles includes twenty-four brightly colored, turtle-shaped pieces that children (and adults) can snap together to build thousands of different shapes including complex geometrical forms such as octahedrons and tetrahedrons. The set includes a fully illustrated instruction manual which demonstrates the construction of more than eighty different geometric shapes. The set can also be used to create and solve various geometrical "puzzles," which range from basic to expert. The bonus? All twenty-four pieces and the manual fit nicely within the heavy-duty cardboard carrying/storage box.