diff --git a/app/main.py b/app/main.py
index 6d375672..88e5eb01 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1,25 +1,99 @@
+from __future__ import annotations
 from abc import ABC
 
 
 class IntegerRange:
-    pass
+    def __init__(
+            self,
+            min_value: int,
+            max_value: int
+    ) -> None:
+        self.min_value = min_value
+        self.max_value = max_value
+
+    def __set_name__(
+            self,
+            owner: SlideLimitationValidator,
+            name: str
+    ) -> None:
+        self.protected_name = "_" + name
+
+    def __get__(
+            self,
+            instance: IntegerRange,
+            owner: SlideLimitationValidator
+    ) -> int:
+        return getattr(instance, self.protected_name)
+
+    def __set__(
+            self,
+            instance: IntegerRange,
+            value: int
+    ) -> None:
+        if value not in range(self.min_value, self.max_value + 1):
+            raise ValueError(
+                f"parameter: {self.protected_name} = {value}"
+                f" out of acceptable range:"
+                f" {self.min_value} - {self.max_value}"
+            )
+        setattr(instance, self.protected_name, value)
 
 
 class Visitor:
-   pass
+    def __init__(
+            self,
+            name: str,
+            age: int,
+            weight: int,
+            height: int
+    ) -> None:
+        self.name = name
+        self.age = age
+        self.weight = weight
+        self.height = height
 
 
 class SlideLimitationValidator(ABC):
-    pass
+    def __init__(
+            self,
+            age: int,
+            weight: int,
+            height: int
+    ) -> None:
+        self.age = age
+        self.weight = weight
+        self.height = height
 
 
 class ChildrenSlideLimitationValidator(SlideLimitationValidator):
-    pass
+    age = IntegerRange(4, 14)
+    weight = IntegerRange(20, 50)
+    height = IntegerRange(80, 120)
 
 
 class AdultSlideLimitationValidator(SlideLimitationValidator):
-    pass
+    age = IntegerRange(14, 60)
+    weight = IntegerRange(50, 120)
+    height = IntegerRange(120, 220)
 
 
 class Slide:
-    pass
+    def __init__(
+            self,
+            name: str,
+            limitation_class: SlideLimitationValidator
+    ) -> None:
+        self.name = name
+        self.limitation_class = limitation_class
+
+    def can_access(self, visitor: Visitor) -> bool:
+        try:
+            self.limitation_class(
+                visitor.age,
+                visitor.weight,
+                visitor.height
+            )
+        except ValueError as e:
+            print(f"visitor: {visitor.name} ", e)
+            return False
+        return True