conundrum
abstract
assemble
background
block
brain
brown
challenge
complete
concept
construct
construction
copy
create
cube
cubic
design
education
figure
finance
game
geometric
geometrical
group
idea
learn
leisure
logic
logical
object
piece
play
problem
puzzle
relax
shape
shapes
solution
space
square
stack
success
symbol
team
tetris
toy
white
wine
wood
wooden