- AudiolivroA PulleyDavid Armentrout
- AudiolivroHistoric Sites & MonumentsDavid Armentrout
- AudiolivroAn Inclined PlaneDavid Armentrout
- AudiolivroA LeverDavid Armentrout
- AudiolivroA WheelDavid Armentrout
- AudiolivroA WedgeDavid Armentrout
- AudiolivroA ScrewDavid Armentrout
- AudiolivroDirt BikesDavid Armentrout
- AudiolivroHistoric & Famous CitiesDavid Armentrout
- AudiolivroStunts, Tricks, and JumpsDavid Armentrout
- AudiolivroThe Fire DepartmentDavid Armentrout
- AudiolivroThe Post OfficeDavid Armentrout