A quick idea for a wood work or art class.
I did this at an Arts Training I participated a couple months back so I haven’t tried with kids yet. But if I ever have to improvise a wood work class, this will be perfect for it!
Basically you just nail two blocks of wood together and paint it. With smaller kids (and if you have the time) you can prepare the chairs beforehand but older students can do them themselves too.
When the chairs are ready you can display them together. Each student can think where he/she wants to place his/her chair in the display.