Abstract: This invention is a toy for kids from grade 1 to high school to study Mathematics. The set up of this toy is like a net. Kids can be benefited from the following. First of all, kids can do mixture operation of addition (+), subtraction (−), multiplication (*) and division (/). Specifically, this toy can help kids to solve problems such as: 1+2+3+ . . . +98+99+100. Second, if the net is well organized, kids can present some basic logical problems. Third, kids will gain analysis and design ability. Finally, kids can get basic knowledge of computer.