diff --git a/labs/lab_1/lab_1a.py b/labs/lab_1/lab_1a.py
index 9d15ec83..be045935 100644
--- a/labs/lab_1/lab_1a.py
+++ b/labs/lab_1/lab_1a.py
@@ -3,12 +3,14 @@
 
 The first lab in the BWSI CSS course. To complete this lab, fill out the variable on line 10
 with your name. Then, save the code, add it to the staging area, and commit it to the Git tree.
+
+This is to stimulate a change made on a robot: robot_speed = 3 # m/s
 """
 
 def main():
     print("Hello World!")
 
-    name = "" # TODO: Insert your name between the double quotes
+    name = "Charlotte King" # TODO: Insert your name between the double quotes
 
     print(f"{name}, Welcome to the CSS course!")
 
diff --git a/labs/lab_1/lab_1b.py b/labs/lab_1/lab_1b.py
index e58dd957..5a28844a 100644
--- a/labs/lab_1/lab_1b.py
+++ b/labs/lab_1/lab_1b.py
@@ -37,13 +37,23 @@ def simple_calculator(operation: str, num1: float, num2: float) -> float:
     else:
         raise ValueError("Invalid operation. Please choose from 'add', 'subtract', 'multiply', or 'divide'.")
 
+def request_sanitized_number(prompt: str) -> float:
+    """
+    Function that takes in a prompt and returns a sanitized number.
+    """
+    while True:
+        try:
+            return float(input(prompt))
+        except ValueError:
+            print("Invalid input. Please enter a valid number.")
+
 def main():
     
     print(f"===== Simple Calculator =====")
 
     # Ask the user for sample input    
-    num1 = float(input("Enter the first number: "))
-    num2 = float(input("Enter the second number: "))
+    num1 = request_sanitized_number("Enter the first number: ")
+    num2 = request_sanitized_number("Enter the second number: ")
     operation = input("Enter the operation (add, subtract, multiply, divide): ").strip().lower()
 
     # Perform the calculation and display the result