Stone Age

Garden 

Cost           10 Water    5 Food          Benefit:  Produce 3 Food if Harvested

Topics:     Simple Motion

Well 

Cost:    5  Lumber    5  Food             Benefit:  Provides 3 water if harvested 

Topics:  Basic Fluids

Campsite 

Cost:   5 Lumber      5 Food                Benefit:  Holds 20 People

Topics:   Basic Energy 

Wood Cutters Shack

Cost     5 Lumber   5  Food               Benefit: Provides 3 water if harvested

Topics:  Basic Momentum

Earthen Walls 

Cost:     10 Lumber   10 Food            Benefit: Reduce Friday Questions by 1                                                                                if harvested  

Topics:      Simple Forces 

Watch Tower 

Cost:      10 Lumber   5 Food   2 People         Benefit: 

Topics:  Basic Waves