Solution

app/main.py

@@ -2,24 +2,68 @@
 
 
 class IntegerRange:
-    pass
+    def __init__(self, min_amount: int, max_amount: int) -> None:
+        self.min_amount = min_amount
+        self.max_amount = max_amount
+
+    def __set_name__(self, owner: type, name: str) -> None:
+        self.protected_name = "_" + name
+
+    def __get__(self, instance: type, owner: type) -> int:
+        return getattr(instance, self.protected_name)
+
+    def __set__(self, instance: type, value: int) -> None:
+        if self.min_amount <= value <= self.max_amount:
+            setattr(instance, self.protected_name, value)
+        else:
+            raise ValueError(f"{self.protected_name}"
+                             f" must be lesser than {self.max_amount}"
+                             f" and more than {self.min_amount}")
 
 
 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, height: int, weight: int) -> None:
+        self.age = age
+        self.weight = weight
+        self.height = height
 
 
 class ChildrenSlideLimitationValidator(SlideLimitationValidator):
-    pass
+    age = IntegerRange(4, 14)
+    height = IntegerRange(80, 120)
+    weight = IntegerRange(20, 50)
 
 
 class AdultSlideLimitationValidator(SlideLimitationValidator):
-    pass
+    age = IntegerRange(14, 60)
+    height = IntegerRange(120, 220)
+    weight = IntegerRange(50, 120)
 
 
 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:
+        try:
+            self.limitation_class(visitor.age, visitor.height, visitor.weight)
+        except ValueError:
+            return False
+        else:
+            return True