diff --git a/other/age_controller.py b/other/age_controller.py
new file mode 100644
index 000000000000..b43f9ae7fae3
--- /dev/null
+++ b/other/age_controller.py
@@ -0,0 +1,65 @@
+"""Age Controller Module
+This module provides functionality to validate and process age input.
+Related to issue #12809.
+"""
+
+
+def validate_age(age: float | str) -> int:
+    """Validate and process age input.
+
+    This function validates that the provided age is a valid positive integer
+    within a reasonable range (0-150 years).
+
+    Args:
+        age: The age input to validate (can be int, str, or float)
+
+    Returns:
+        int: The validated age as an integer
+
+    Raises:
+        ValueError: If age is invalid, negative, or out of range
+        TypeError: If age cannot be converted to a number
+
+    Examples:
+        >>> validate_age(25)
+        25
+        >>> validate_age('30')
+        30
+        >>> validate_age(45.0)
+        45
+        >>> validate_age(-5)
+        Traceback (most recent call last):
+            ...
+        ValueError: Age must be a positive number
+        >>> validate_age(200)
+        Traceback (most recent call last):
+            ...
+        ValueError: Age must be between 0 and 150 years
+        >>> validate_age('invalid')
+        Traceback (most recent call last):
+            ...
+        ValueError: Invalid age format
+        >>> validate_age(25.5)
+        Traceback (most recent call last):
+            ...
+        ValueError: Age must be a whole number
+    """
+    # Convert age to appropriate numeric type
+    age_int = int(age) if isinstance(age, int | float) else int(str(age))
+
+    # Validate that the age is a whole number if it was a float
+    if isinstance(age, float) and age != age_int:
+        msg = "Age must be a whole number"
+        raise ValueError(msg)
+
+    # Validate age is positive
+    if age_int < 0:
+        msg = "Age must be a positive number"
+        raise ValueError(msg)
+
+    # Validate age is within reasonable range
+    if age_int > 150:
+        msg = "Age must be between 0 and 150 years"
+        raise ValueError(msg)
+
+    return age_int