diff --git a/Day 3 : class vs instance b/Day 3 : class vs instance
new file mode 100644
index 0000000..376ed83
--- /dev/null
+++ b/Day 3 : class vs instance	
@@ -0,0 +1,29 @@
+class Person:
+    def __init__(self, initialAge):
+        if initialAge > 0:
+            self.age = initialAge
+        else:
+            print("Age is not valid, setting age to 0.")
+            self.age = 0
+
+    def amIOld(self):
+        if self.age < 13:
+            print("You are young.")
+        elif self.age < 18:
+            print("You are a teenager.")
+        else:
+            print("You are old.")
+
+    def yearPasses(self):
+        self.age += 1
+
+
+t = int(input())
+for i in range(0, t):
+    age = int(input())
+    p = Person(age)
+    p.amIOld()
+    for j in range(0, 3):
+        p.yearPasses()
+    p.amIOld()
+    print("")