I am only very familiar with the first game, though I feel like there will probably be relevant examples in the other games worth discussing so feel free to discuss them. What are these things? As for the pencils I am specifically referring to the text
1) clear ruler.
2) pencil. HI-UNI HB (mitsubishi) http://www.mpuni.co.jp/products/pencils/black/uni_series/hi_uni/hi_uni.html
3) tetrapod. wave-dissipating concrete block. http://www.fudotetra.co.jp/products/tetrapod.html
For whatever reason I didn't expect a response, thanks a lot for being so informative. Now these themes make a little more sense