diff --git a/simple_utils.py b/simple_utils.py
index 614c847..dc5c07e 100644
--- a/simple_utils.py
+++ b/simple_utils.py
@@ -1,13 +1,39 @@
 # simple_utils.py - A tiny utility library
 
 def reverse_string(text):
-    """Reverses the characters in a string."""
+    """
+    Return a new string with the characters of the input string in reverse order.
+    
+    Parameters:
+        text (str): The string to be reversed.
+    
+    Returns:
+        str: The reversed string.
+    """
     return text[::-1]
 
 def count_words(sentence):
+    """
+    Return the number of words in a sentence by splitting on whitespace.
+    
+    Parameters:
+    	sentence (str): The input string to count words from.
+    
+    Returns:
+    	int: The number of words in the sentence.
+    """
     return len(sentence.split())
 
 def celsius_to_fahrenheit(celsius):
+    """
+    Convert a temperature from Celsius to Fahrenheit.
+    
+    Parameters:
+        celsius (float): Temperature value in degrees Celsius.
+    
+    Returns:
+        float: Equivalent temperature in degrees Fahrenheit.
+    """
     return (celsius * 9/5) + 32