Sentence 1: Katie was playing outside one day. 
 Sentence 3: Soon there were lots of snowflake all around her 
 Sentence 4:  Katie caught some snowflakes on her tongue 
 Sentence 5:  She played in the falling snow until dinnertime 
 Option 1: She saw a snowflake fall from the sky. 
 Option 2: She saw a rain drop fall from the sky in the heat.