diff --git a/docs/examples.md b/docs/examples.md
index ffb0d0a..02d8f3c 100644
--- a/docs/examples.md
+++ b/docs/examples.md
@@ -61,6 +61,19 @@ std::vector<element> children = root.elems();
 std::vector<element> children = root.elems("child");
 ```
 
+#### Insertion
+
+```C++
+using namespace myxml;
+element root("root");
+element child("child");
+root.push_back(child);
+REQUIRE(root.first_elem().name() == "child");
+element next("next");
+root.push_front(next);
+REQUIRE(root.first_elem().name() == "next");
+```
+
 ### Text
 
 ```C++
diff --git a/include/myxml/element.hpp b/include/myxml/element.hpp
index c49a72a..67bf618 100644
--- a/include/myxml/element.hpp
+++ b/include/myxml/element.hpp
@@ -3,14 +3,42 @@
 #include <optional>
 #include <string>
 #include <map>
+#include <type_traits>
 
 #include "myxml/text.hpp"
 #include "myxml/cdata.hpp"
 #include "myxml/printable.hpp"
+#include "myxml/interface.hpp"
 
 namespace myxml
 {
 
+    struct element_impl : public composite_node // public std::enable_shared_from_this<Element>, public Node
+    {
+    public:
+        std::string _name;
+        std::map<std::string, std::string, std::less<>> _attributes;
+
+        /* Set initializer as private to avoid using Element without share_ptr*/
+
+        virtual ~element_impl() = default;
+        explicit element_impl(std::string_view name);
+        element_impl() = default;
+        /* Builder */
+        // Wraps creating shared_ptr
+        static std::shared_ptr<element_impl> _new(std::string_view name);
+        static std::shared_ptr<element_impl> _new();
+        static std::shared_ptr<element_impl> parse(std::string_view buf);
+        static std::shared_ptr<element_impl> load(std::string_view path);
+
+        /* Manipulate */
+        void extend_attributes(std::map<std::string, std::string>);
+        std::string &operator[](const std::string &);
+
+        /* Implement Exportable */
+        virtual void print(std::ostream &) const override;
+    };
+
     enum class ClosingType
     {
         Closed,
@@ -25,7 +53,7 @@ namespace myxml
         element operator""_elem(const char *, std::size_t);
     }
 
-    class element : public printable
+    class element : public printable, public interface
     {
 
         friend element literals::operator""_elem(const char *, std::size_t);
@@ -44,40 +72,31 @@ namespace myxml
         std::string &operator[](const std::string &);
         std::string_view name();
 
+        /* Query */
         element first_elem();
         element first_elem(std::string_view);
         text first_text();
         cdata first_cdata();
 
+        /* Manipulate */
+        template <typename T, typename SFINAE = std::enable_if_t<std::is_base_of_v<interface, T>>>
+        void push_back(T child)
+        {
+            _impl->push_back(child.impl());
+        }
+
+        template <typename T, typename SFINAE = std::enable_if_t<std::is_base_of_v<interface, T>>>
+        void push_front(T child)
+        {
+            _impl->push_front(child.impl());
+        }
+
         /* Implement printable */
         virtual void print(std::ostream &) const override;
         virtual void entity_encoding(bool) override;
         virtual void platform_specific_newline(bool) override;
-    };
-
-    struct element_impl : public composite_node // public std::enable_shared_from_this<Element>, public Node
-    {
-    public:
-        std::string _name;
-        std::map<std::string, std::string, std::less<>> _attributes;
-
-        /* Set initializer as private to avoid using Element without share_ptr*/
-
-        virtual ~element_impl() = default;
-        explicit element_impl(std::string_view name);
-        element_impl() = default;
-        /* Builder */
-        // Wraps creating shared_ptr
-        static std::shared_ptr<element_impl> _new(std::string_view name);
-        static std::shared_ptr<element_impl> _new();
-        static std::shared_ptr<element_impl> parse(std::string_view buf);
-        static std::shared_ptr<element_impl> load(std::string_view path);
 
-        /* Manipulate */
-        void extend_attributes(std::map<std::string, std::string>);
-        std::string &operator[](const std::string &);
-
-        /* Implement Exportable */
-        virtual void print(std::ostream &) const override;
+        /* Implement interface*/
+        virtual std::shared_ptr<node> impl() { return _impl; }
     };
 }
diff --git a/include/myxml/interface.hpp b/include/myxml/interface.hpp
new file mode 100644
index 0000000..2365255
--- /dev/null
+++ b/include/myxml/interface.hpp
@@ -0,0 +1,14 @@
+#pragma once
+#include <memory>
+#include "myxml/node.hpp"
+
+namespace myxml
+{
+    // contains an _impl
+    // e.g. element, text, cdata
+    class interface
+    {
+    public:
+        virtual std::shared_ptr<node> impl() = 0;
+    };
+}
\ No newline at end of file
diff --git a/src/element.cpp b/src/element.cpp
index 5bfacbc..e8a2119 100644
--- a/src/element.cpp
+++ b/src/element.cpp
@@ -104,28 +104,6 @@ namespace myxml
         return this->_attributes[key];
     }
 
-    // std::string element_impl::ExportRaw() const
-    // {
-
-    //     std::string builder = "<" + std::string(this->name);
-    //     for (const auto &[key, value] : this->attributes)
-    //     {
-    //         builder += "" + key + "=\"" + value + "\"";
-    //     }
-    //     if (this->FirstChild() == nullptr)
-    //     {
-    //         builder += " />";
-    //         return builder;
-    //     }
-    //     builder += ">";
-    //     for (auto node = this->FirstChild(); node != nullptr; node = node->NextSibiling())
-    //     {
-    //         builder += node->ExportRaw();
-    //     }
-    //     builder += "</" + std::string(this->name) + ">";
-    //     return builder;
-    // }
-
     void element_impl::print(std::ostream &os) const
     {
         os << "<" << this->_name;
diff --git a/tests/element_test.cpp b/tests/element_test.cpp
index b0c7e2d..c85393b 100644
--- a/tests/element_test.cpp
+++ b/tests/element_test.cpp
@@ -49,7 +49,37 @@ TEST_CASE("Element Impl", "[element]")
     }
 }
 
-TEST_CASE("Custom String Literal", "[Element]")
+TEST_CASE("Element Interface", "[element]")
+{
+    using namespace myxml;
+    using namespace myxml::literals;
+
+    element root("root");
+    element child("child");
+
+    SECTION("element::name")
+    {
+        REQUIRE(root.name() == "root");
+    }
+
+    SECTION("insertion")
+    {
+
+        root.push_back(child);
+        REQUIRE(root.first_elem().name() == "child");
+        element next("next");
+        root.push_front(next);
+        REQUIRE(root.first_elem().name() == "next");
+    }
+
+    SECTION("query by name")
+    {
+        root.push_back(child);
+        REQUIRE(root.first_elem("child").name() == "child");
+    }
+}
+
+TEST_CASE("Custom String Literal", "[element]")
 {
     using namespace myxml::literals;
     auto elem = "<root></root>"_elem;