Here is the plastic box built around theplastic base. there are some borders on the *underside* too because i will haveto "tune" the ricefield.
As you can see, all are fixed using a small Magic Sculp lump.
that's it, If i want all the little plants to be roughly of the same height, Ihave to press out the plants more or less through the holes I carved.In the end I have this..  think that 3 to 5mm of the plants should be underwater which should end up having those smallrice plants popping out of the water..