diff --git a/aiogram/types/base.py b/aiogram/types/base.py
index e291afe5..2770fd84 100644
--- a/aiogram/types/base.py
+++ b/aiogram/types/base.py
@@ -4,7 +4,6 @@ from typing import TypeVar
 
 from .fields import BaseField
 from ..utils import json
-from ..utils.context import get_value
 
 PROPS_ATTR_NAME = '_props'
 VALUES_ATTR_NAME = '_values'
@@ -187,15 +186,61 @@ class TelegramObject(metaclass=MetaTelegramObject):
         return self.as_json()
 
     def __getitem__(self, item):
+        """
+        Item getter (by key)
+
+        :param item:
+        :return:
+        """
         if item in self.props:
             return self.props[item].get_value(self)
         raise KeyError(item)
 
     def __setitem__(self, key, value):
+        """
+        Item setter (by key)
+
+        :param key:
+        :param value:
+        :return:
+        """
         if key in self.props:
             return self.props[key].set_value(self, value, self.conf.get('parent', None))
         raise KeyError(key)
 
     def __contains__(self, item):
+        """
+        Check key contains in that object
+
+        :param item:
+        :return:
+        """
         self.clean()
         return item in self.values
+
+    def __iter__(self):
+        """
+        Iterate over items
+
+        :return:
+        """
+        for item in self.to_python().items():
+            yield item
+
+    def iter_keys(self):
+        """
+        Iterate over keys
+
+        :return:
+        """
+        for key, _ in self:
+            yield key
+
+    def iter_values(self):
+        """
+        Iterate over values
+
+        :return:
+        """
+        for _, value in self:
+            yield value
diff --git a/aiogram/types/inline_keyboard.py b/aiogram/types/inline_keyboard.py
index 636f101c..76c47e98 100644
--- a/aiogram/types/inline_keyboard.py
+++ b/aiogram/types/inline_keyboard.py
@@ -54,7 +54,7 @@ class InlineKeyboardMarkup(base.TelegramObject):
         """
         btn_array = []
         for button in args:
-            btn_array.append(button.to_json())
+            btn_array.append(button.to_python())
         self.inline_keyboard.append(btn_array)
         return self
 
diff --git a/aiogram/types/reply_keyboard.py b/aiogram/types/reply_keyboard.py
index c16bc496..27a595c2 100644
--- a/aiogram/types/reply_keyboard.py
+++ b/aiogram/types/reply_keyboard.py
@@ -41,7 +41,7 @@ class ReplyKeyboardMarkup(base.TelegramObject):
             elif isinstance(button, bytes):
                 row.append({'text': button.decode('utf-8')})
             else:
-                row.append(button.to_json())
+                row.append(button.to_python())
             if i % self.row_width == 0:
                 self.keyboard.append(row)
                 row = []
@@ -55,7 +55,7 @@ class ReplyKeyboardMarkup(base.TelegramObject):
             if isinstance(button, str):
                 btn_array.append({'text': button})
             else:
-                btn_array.append(button.to_json())
+                btn_array.append(button.to_python())
         self.keyboard.append(btn_array)
         return self
 
diff --git a/docs/source/quick_start.rst b/docs/source/quick_start.rst
index a9ff0890..c5ff7e9c 100644
--- a/docs/source/quick_start.rst
+++ b/docs/source/quick_start.rst
@@ -48,5 +48,9 @@ Summary
 	bot = Bot(token='BOT TOKEN HERE')
 	dp = Dispatcher(bot)
 
+	@dp.message_handler(commands=['start', 'help'])
+	async def send_welcome(message: types.Message):
+		await message.reply("Hi!\nI'm EchoBot!\nPowered by aiogram.")
+
 	if __name__ == '__main__':
 		executor.start_polling(dp)