2Pc CD The Learning Company Clue Finders 6th Grade Adventure Empire of the Plant Personalized Learning Center 2 CD Set. for Ages 10-12+ working condition This is a 2 CD Set. Ages 10-12+ Solve a mystery in an underground world! Join the search for the missing Clue Finders in the underground empire of the Plant People! A mighty army of mutant plant warriors threatens to take over the town above. Use your head to tackle tricky challenges, solve a mystery, and save the town from destruction. From cleaning up deadly pollutants to building bridges, every exciting activity builds essential 6th grade skills!