36 Cube

If you like puzzles, you’ll love the 36 Cube ($18), a 3D sudoku puzzle (think Rubik’s cube meets sudoku). It includes a gray base that looks like a city skyline and 36 colored towers in six different colors and heights. Your mission – should you accept it – place all the towers onto the base and form a level cube with each of the six colors appearing only once in each row and column. Seems simple, right? Riiiight.