Our three children are all creative and this creation is amazing. Our son made this in his apartment, he doesn’t have a shed so all the work was done either in his courtyard or in his kitchen! What he has made is a Japanese soaking tub.
This website tells you all about Japanese soaking tubs.
You can see lots of ideas for these on Pinterest
This picture most accurately resembles the one my son has built.
The tub he has built had only one coat of varnish on it when I saw it and he still had other coats to put on but the actual construction was finished.
He has cleverly constructed it so there is a seat which can be placed inside and also used as part of the lid when the bath is filling with water – this helps to keep the water warm when filling.
The tub will fit into his shower recess in his apartment. I am impressed.