Icosoku game

Box dimensions: 19x19x13cm. Age: 7+. First, remove all the triangles and numbered buttons. Then, randomly place the 12 numbered buttons onto the puzzle. You win when you have correctly placed all the triangles with dots so that the numbers match the surrounding dots, with no pieces left over. To create a new challenge, simply swap a couple of numbered buttons, and you have a new puzzle to solve! Remember: There's always a solution!