Product Ideas with manufacturing in quantity considerations

Lamps (Table, floor standing, desk, work), Wired / Bluetooth speaker, Radio / Alarm clock using programmable components, AQI Monitor - using programmable components (Hackable), Chair design, desk

You should look to use as many practical workshop skills as possible. This list is not exhaustive but could include: 

Cutting of materials using a range of saws; filing materials; Wood lathe to turn timber - dials, base, cyclindrical forms, bowls; Centre Lathe to turn Aluminium / Brass parts such as dials, holders, aesthetics rings / details; CNC Router; Vacuum forming, line bending, blow moulding; Casting - pewter, concrete, resin, resin pouring. 

The use of CAD / 3D printing for parts / connectors / fixings to add to what you design rather than the main element. Using timber sections combined with 3D printed joining 'lugs' / connectors / fixings is a really good approach.

https://grovemade.com/journal/designing-the-headphone-stand