concrete trough and a sash window

My Dad is brilliant at scavenging useful materials. Here's some more things he found that we'll be able to use:

An old cement trough, from a neighbor:



A sash window:



Dad thinks this will do well for the kitchen windowbox window. The dimensions are: 860x860mm. It would need a casing so it could be opened with a winder so the dimensions would run to approximately 900x900mm.