Maddie's Do You Know?

BBC RB 1

Monday 11 May 2020  11:40 - 12:00 (20 mins)
Lock & Key and Glass. Maddie uses a special camera and animation to see how a key works inside a lock and shows how the hidden barrel and pins allow the matching key to unlock it. [S]

Maddie's Do You Know? may be available on playback
Maddie's Do You Know? (BBC RB 1) Monday 11 May 2020 11:40 - 12:00