The medium is the message.
the 1 second passer by will see a pretty picture and possibly register the “know”.
IOW just another nativity scene.
The sign actually is part truthful about the myth of the wiseman at the manger scene. Did you know that the wiseman never appeared at the manger? The wiseman appeared at Jesus “house.”
Matthew 2:1-2:
“Now when Jesus was born in Bethlehem of Judaea in the days of Herod the king, behold, there came wise men from the east to Jerusalem,
Saying, Where is he that is born King of the Jews? for we have seen his star in the east, and are come to worship him.”
However, Matthew 2:11 states that they came to His house:
Matthew 2:11 “And when they were come into the house, they saw the young child with Mary his mother, and fell down, and worshipped him...”
And Matthew 2:16 states that Herod had all the children two years and under slain, according to the time he learned from the wise men.
Matthew 2:16 “Then Herod, when he saw that he was mocked of the wise men, was exceeding wroth, and sent forth, and slew all the children that were in Bethlehem, and in all the coasts thereof, from two years old and under, according to the time which he had diligently inquired of the wise men.”
Therefore it is likely that Jesus was 1 to 2 years old.