Six 10 face standard polyhedral dice in assorted colours: 1 each of 0-9, 00-90, 000-900, 0000-9000, 00000-90000 and 000000-900000. By throwing one of each of the dice, you can create a 6 digit number. Perfect for addition and subtraction with larger numbers. For practising expanded notation and rounding of numbers. Also the multiplicative relationship between places (each place is worth 10 times more than that to its right) and much more.