This technically was longer than 30 minutes due to the plaster drying but since the wife, not me, did this it counts as under 30 minutes. In fact this took me 0 minutes to make. Nice!
The wife made a base of foamboard (MDF would have been better in hindsight) and "built it up" with chunks of foamboard. The plaster of paris step is simply like playing with mudpies. After a wait for it to dry, a very quick splash of paint later, and voila, undersea volcano!
Apart from replacing the foamboard base with MDF, the main other change would be to touch up the paint job a bit. Since it took me 0 minutes to build, I don't care, though!
The wife made a base of foamboard (MDF would have been better in hindsight) and "built it up" with chunks of foamboard. The plaster of paris step is simply like playing with mudpies. After a wait for it to dry, a very quick splash of paint later, and voila, undersea volcano!
In my submarine fighter game the heated water from the thermal vents will interfere with targeting and missile locks, providing "cover" of sorts
Apart from replacing the foamboard base with MDF, the main other change would be to touch up the paint job a bit. Since it took me 0 minutes to build, I don't care, though!