- AudiolibroA PulleyDavid Armentrout
- AudiolibroHistoric Sites & MonumentsDavid Armentrout
- AudiolibroAn Inclined PlaneDavid Armentrout
- AudiolibroA LeverDavid Armentrout
- AudiolibroA WheelDavid Armentrout
- AudiolibroA WedgeDavid Armentrout
- AudiolibroA ScrewDavid Armentrout
- AudiolibroDirt BikesDavid Armentrout
- AudiolibroHistoric & Famous CitiesDavid Armentrout
- AudiolibroStunts, Tricks, and JumpsDavid Armentrout
- AudiolibroThe Fire DepartmentDavid Armentrout
- AudiolibroThe Post OfficeDavid Armentrout