diff --git a/app/main.py b/app/main.py
index 6d375672..1a96c618 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1,25 +1,79 @@
-from abc import ABC
+from abc import ABC, abstractmethod
 
 
 class IntegerRange:
-    pass
+    def __init__(self, min_amount: int, max_amount: int) -> None:
+        self.min_amount = min_amount
+        self.max_amount = max_amount
+
+    def __get__(self, instance: object, owner: type) -> None:
+        return instance.__dict__[self.name]
+
+    def __set__(self, instance: object, value: int) -> None:
+        if not self.min_amount <= value <= self.max_amount:
+            raise ValueError(f"{self.name} must be between "
+                             f"{self.min_amount} and {self.max_amount}")
+        instance.__dict__[self.name] = value
+
+    def __set_name__(self, owner: type, name: str) -> None:
+        self.name = name
 
 
 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
+
+    age: IntegerRange = IntegerRange(0, 150)
+    weight: IntegerRange = IntegerRange(0, 500)
+    height: IntegerRange = IntegerRange(0, 300)
 
 
 class SlideLimitationValidator(ABC):
-    pass
+    def __init__(self, age: tuple, weight: tuple, height: tuple) -> None:
+        self.age = age
+        self.weight = weight
+        self.height = height
+
+    @abstractmethod
+    def validate(self, visitor: Visitor) -> bool:
+        pass
 
 
 class ChildrenSlideLimitationValidator(SlideLimitationValidator):
-    pass
+    def __init__(self) -> None:
+        super().__init__(age=(4, 14), weight=(20, 50), height=(80, 120))
+
+    def validate(self, visitor: Visitor) -> bool:
+        if (
+            self.age[0] <= visitor.age <= self.age[1]
+            and self.weight[0] <= visitor.weight <= self.weight[1]
+            and self.height[0] <= visitor.height <= self.height[1]
+        ):
+            return True
+        return False
 
 
 class AdultSlideLimitationValidator(SlideLimitationValidator):
-    pass
+    def __init__(self) -> None:
+        super().__init__(age=(14, 60), weight=(50, 120), height=(120, 220))
+
+    def validate(self, visitor: Visitor) -> bool:
+        if (
+            self.age[0] <= visitor.age <= self.age[1]
+            and self.weight[0] <= visitor.weight <= self.weight[1]
+            and self.height[0] <= visitor.height <= self.height[1]
+        ):
+            return True
+        return False
 
 
 class Slide:
-    pass
+    def __init__(self, name: str, limitation_class: type) -> None:
+        self.name = name
+        self.limitation_class = limitation_class
+
+    def can_access(self, visitor: Visitor) -> bool:
+        return self.limitation_class().validate(visitor)