Let your child have a grand adventure when he or she uses this ruler to get to know history's greatest explorers. Great as a gift or an educational tool, this ruler by Channel Craft Industries was created to help owners travel back in time to the age of exploration. -- Let your child have a grand adventure when he or she uses this ruler to get to know history's greatest explorers. Great as a gift or an educational tool, this ruler by Channel Craft Industries was created to help owners travel back in time to the age of exploration.
