We have a bunch of crazy dice at our house, including fractions dice, decimal dice, money dice, alien dice, dice with colored dots on them, and dice within dice. We also have a bunch of Dungeons and Dragons dice from a toy store in Duluth, Minnesota. Instead of six sides, those dice have four, eight, ten, twelve, and even twenty sides.
Yesterday I found my kids playing Monopoly with the crazy dice. If they paid $5 to the bank, they got to use one of the crazy dice. If they paid $10, they got to use two. If they used a die with a color dot, they got to move to the set of properties with that color.
Kids don't need us to 'train them' to be creative. They just need permission, space for their creativity to blossom, and maybe a little active encouragement and/or nurturing of their creative spirits.
Roll the dice and see what happens!