conundrum
abstract
background
block
building
challenge
close up
color
colorful
concept
connection
construct
construction
cooperation
create
creative
creativity
cube
cubic
design
element
figure
fun
game
geometric
geometrical
graphic
group
idea
individuality
learning
logic
logical
multicolored
piece
play
ponder
problem
puzzle
shape
solution
square
strategics
symbol
teamwork
technology
think
toy
wooden