These blocks were planted in our world not only as representatives of extraterrestrial intelligence. Each of the blocks is a unique psychotropic weapons, insidious effect on the human brain.
Watch carefully! Cubes are dangerous for the psyche.
For the duck with the letter "E", which is a pig - it's really very cruel.
Camouflage cover "cubes with fairy tales" - to earthlings about anything not already guessed:
Pathetic attempts to cover. Obviously the same as the extraterrestrial mind.