The fundamental particles (atoms or molecules) of many materials will arrange themselves into masses that have specific shapes as they crystallize or freeze. Water is remarkable in this regard. Snowflakes are crystals of water. Images of actual snowflakes are seen here: https://www.google.com/search?q=real+snowflakes+images&sxsrf=ALeKk011CIKQ186m03X9NHBkuTFVFkQQEA:1609371880595&tbm=isch&source=iu&ictx=1&fir=mNws_XZ3a1eoAM%252CodF2LiIj7SMZ_M%252C_&vet=1&usg=AI4_-kQKvfORa0otG-uskhXeJVgaXl3Tyw&sa=X&ved=2ahUKEwjng4S68fbtAhXJjFkKHf8UBLgQ9QF6BAgQEAE&biw=1645&bih=1014#imgrc=mNws_XZ3a1eoAM
While each snowflake is distinct, they have a common feature. What is it? (Please post questions that kids ask?)