1. In this make oil rigs, superoil tanker, cargo container,
2. make a oil field miniature, fill oil under and start extraction and it will pump out the fossil fuel,as same do for coal field and other mines
3. Make cave system in it and it will have diff caves made from diff material wood, stone, cement, mud, branches, grasses and glass
4. Make a ship or a yatch that can do underwater while traveling not standby go down slowly and then goes to a certain depth and then can dive up. do the underwater test in wavy situation in my ocean experiment center.
5. Make miniature of ancient wood sails or ships and boats and the kerala that boat race and other area boats race design
6. Make miniature of oil rig and prelude
7. soil or stone carrying bridge opens gate and dispose the material on the destination sea bed