I've got 2 underway. Both boards are designed to be reversable.
For info's sake, here are the materials:
- 3/16" 4x8 hardboard sheets
- 3/4" 4x8 insulation foam sheets
- I glue everything down with regular white (Elmers or PVA) glue which I buy by the gallon.
- Beach Sand (though I technically get it from a local volleyball court, cuz its cleaner and drier)
Board #1 is designed to be expandable to 6x4 - thus the open space in the middle to add another partition. However, the hills are reversible and can be lined up back-to-back for a cool ridge.
Board #2 looks like it will have some water features, but that's actually just contours meant to look like dry creek beds. Water features take a lot more steps, materials, and time. Again, the board is reversible, but will not be expandable.