Herewith, something a bit different, ideal perhaps for games like Mike Rayhawk's BrikWars. See: https://brikwars.com/ and https://en.wikipedia.org/wiki/BrikWars
"BrikWars is a miniatures wargame, but unlike more
serious wargames, BrikWars is intended for battles between toys, and especially
plastic building bricks and other construction toys. The BrikWars rules let
players take turns moving toy troops and toy vehicles through toy terrain to
attack one another with toy weapons and die horrifying toy deaths." - See: https://boardgamegeek.com/boardgame/7623/brikwars
“BrikWars battles take
place in a world of minifigs, and the minifig species draws its heritage from
generations of hard fought survival in the toy chests of six-year-old boys.
Whether knights, spacemen, construction workers, or chefs, their souls thrill
with the racial memory of a time when a toy's highest calling was to do joyous
and bloody battle with all challengers.” – Page 9 BrikWars Rulebook, do
love this quote especially given that my son is six years old.
My son wanted a mech warrior type robot made from Lego so the two of us put this together. He has a man inside though he is not visible through the dark glass. The Star Wars Lego piece is for scale.
I am sure one could use Lego blocks and something like this as the substructure to a model mech by then removing any obvious Lego appearance and adding detail. Indeed, I think Lego blocks can be a potential resource for building models, especially to build up the basic substructure.
His upper body can turn 360 degrees as his upper and lower body are attached using a part that can turn. His forearms can also move. As can be seen he has an array of various weapons and my son and I called him the robot of death.