diff --git a/MenuItem.cpp b/MenuItem.cpp
new file mode 100644
index 0000000..7a06a5d
--- /dev/null
+++ b/MenuItem.cpp
@@ -0,0 +1,69 @@
+#include "MenuItem.h"
+#include "Arduino.h"
+
+MenuItem::MenuItem() {
+
+}
+
+MenuItem::MenuItem(const char* name) {
+  MenuItem::name = name;
+  MenuItem::parent = NULL;
+  MenuItem::next = NULL;
+}
+
+MenuItem* MenuItem::goBack() {
+  return MenuItem::parent;
+}
+
+MenuItem* MenuItem::goDown() {
+  return MenuItem::next;
+}
+
+MenuItem* MenuItem::goRight() {
+  return NULL;
+}
+
+String MenuItem::display() {
+  return MenuItem::name;
+}
+
+
+BranchMenuItem::BranchMenuItem(const char* name, const MenuItem* child) {
+  BranchMenuItem::name = name;
+  BranchMenuItem::child = child;
+}
+
+MenuItem* BranchMenuItem::goRight() {
+  return BranchMenuItem::child;
+}
+
+String BranchMenuItem::display() {
+  return String(BranchMenuItem::name) + " ->";
+}
+
+IntValueItem::IntValueItem(char const* name, int initial) {
+  IntValueItem::name = name;
+  IntValueItem::value = initial;
+}
+
+MenuItem* IntValueItem::goRight() { // increment
+  IntValueItem::value++;
+}
+
+String IntValueItem::display() {
+  return String(IntValueItem::name) + ": " + String(IntValueItem::value);
+}
+
+BoolValueItem::BoolValueItem(char const* name, bool initial) {
+  BoolValueItem::name = name;
+  BoolValueItem::value = initial;
+}
+
+MenuItem* BoolValueItem::goRight() { // toggle
+  BoolValueItem::value = !BoolValueItem::value;
+  return NULL;
+}
+
+String BoolValueItem::display() {
+  return String(BoolValueItem::name) + ": " + (BoolValueItem::value ? "true" : "false");
+}
\ No newline at end of file
diff --git a/MenuItem.h b/MenuItem.h
new file mode 100644
index 0000000..11dc8b1
--- /dev/null
+++ b/MenuItem.h
@@ -0,0 +1,48 @@
+#ifndef MenuItem_h
+#define MenuItem_h
+
+#include "Arduino.h"
+
+class MenuItem {
+    public:
+        MenuItem();
+        MenuItem(const char* name);
+        const char* name;
+        MenuItem* parent;
+        MenuItem* next;
+        MenuItem* goBack();
+        MenuItem* goDown();
+        MenuItem* goRight(); 
+        String display();
+//        void addChild(MenuItem* c) {
+//            if (!child) child = c;
+//            c->parent = this;
+//        }
+};
+
+class BranchMenuItem: public MenuItem {
+    public:
+        using MenuItem::MenuItem;
+        BranchMenuItem(const char* name, const MenuItem* child);
+        MenuItem* child;
+        MenuItem* goRight();
+        String display();
+};
+
+class IntValueItem: public MenuItem {
+    public:
+        IntValueItem(const char* name, const int initialValue);
+        int value;
+        MenuItem* IntValueItem::goRight();
+        String IntValueItem::display();
+};
+
+class BoolValueItem: public MenuItem {
+    public:
+        BoolValueItem(const char* name, const bool initialValue);
+        bool value;
+        MenuItem* BoolValueItem::goRight();
+        String BoolValueItem::display();
+};
+
+#endif
\ No newline at end of file
diff --git a/watering_system_mini_project/MenuItem.cpp b/watering_system_mini_project/MenuItem.cpp
new file mode 100644
index 0000000..7a06a5d
--- /dev/null
+++ b/watering_system_mini_project/MenuItem.cpp
@@ -0,0 +1,69 @@
+#include "MenuItem.h"
+#include "Arduino.h"
+
+MenuItem::MenuItem() {
+
+}
+
+MenuItem::MenuItem(const char* name) {
+  MenuItem::name = name;
+  MenuItem::parent = NULL;
+  MenuItem::next = NULL;
+}
+
+MenuItem* MenuItem::goBack() {
+  return MenuItem::parent;
+}
+
+MenuItem* MenuItem::goDown() {
+  return MenuItem::next;
+}
+
+MenuItem* MenuItem::goRight() {
+  return NULL;
+}
+
+String MenuItem::display() {
+  return MenuItem::name;
+}
+
+
+BranchMenuItem::BranchMenuItem(const char* name, const MenuItem* child) {
+  BranchMenuItem::name = name;
+  BranchMenuItem::child = child;
+}
+
+MenuItem* BranchMenuItem::goRight() {
+  return BranchMenuItem::child;
+}
+
+String BranchMenuItem::display() {
+  return String(BranchMenuItem::name) + " ->";
+}
+
+IntValueItem::IntValueItem(char const* name, int initial) {
+  IntValueItem::name = name;
+  IntValueItem::value = initial;
+}
+
+MenuItem* IntValueItem::goRight() { // increment
+  IntValueItem::value++;
+}
+
+String IntValueItem::display() {
+  return String(IntValueItem::name) + ": " + String(IntValueItem::value);
+}
+
+BoolValueItem::BoolValueItem(char const* name, bool initial) {
+  BoolValueItem::name = name;
+  BoolValueItem::value = initial;
+}
+
+MenuItem* BoolValueItem::goRight() { // toggle
+  BoolValueItem::value = !BoolValueItem::value;
+  return NULL;
+}
+
+String BoolValueItem::display() {
+  return String(BoolValueItem::name) + ": " + (BoolValueItem::value ? "true" : "false");
+}
\ No newline at end of file
diff --git a/watering_system_mini_project/MenuItem.h b/watering_system_mini_project/MenuItem.h
new file mode 100644
index 0000000..11dc8b1
--- /dev/null
+++ b/watering_system_mini_project/MenuItem.h
@@ -0,0 +1,48 @@
+#ifndef MenuItem_h
+#define MenuItem_h
+
+#include "Arduino.h"
+
+class MenuItem {
+    public:
+        MenuItem();
+        MenuItem(const char* name);
+        const char* name;
+        MenuItem* parent;
+        MenuItem* next;
+        MenuItem* goBack();
+        MenuItem* goDown();
+        MenuItem* goRight(); 
+        String display();
+//        void addChild(MenuItem* c) {
+//            if (!child) child = c;
+//            c->parent = this;
+//        }
+};
+
+class BranchMenuItem: public MenuItem {
+    public:
+        using MenuItem::MenuItem;
+        BranchMenuItem(const char* name, const MenuItem* child);
+        MenuItem* child;
+        MenuItem* goRight();
+        String display();
+};
+
+class IntValueItem: public MenuItem {
+    public:
+        IntValueItem(const char* name, const int initialValue);
+        int value;
+        MenuItem* IntValueItem::goRight();
+        String IntValueItem::display();
+};
+
+class BoolValueItem: public MenuItem {
+    public:
+        BoolValueItem(const char* name, const bool initialValue);
+        bool value;
+        MenuItem* BoolValueItem::goRight();
+        String BoolValueItem::display();
+};
+
+#endif
\ No newline at end of file
diff --git a/watering_system_mini_project/watering_system_mini_project.ino b/watering_system_mini_project/watering_system_mini_project.ino
new file mode 100644
index 0000000..4d4baa9
--- /dev/null
+++ b/watering_system_mini_project/watering_system_mini_project.ino
@@ -0,0 +1,44 @@
+
+  MenuItem top = MenuItem("Main menu");
+  MenuItem* current = ⊤
+  MenuItem toggle = BoolValueItem("A switch", false);
+  MenuItem sub = BranchMenuItem("Sub menu", &toggle);
+  MenuItem next = IntValueItem("Power", 1);
+
+void displayMenu() {
+  Serial.println("---- MENU ----");
+  Serial.println(current->display());
+  Serial.println("--------------");
+}
+
+void setup() {
+  Serial.begin(9600);
+
+  top.next = ⊂
+  sub.nex t = &main;
+
+  displayMenu();
+}
+
+void loop() {
+  if (Serial.available()) {
+    int button = Serial.parseInt();
+    MenuItem* new_menu = NULL;
+    if (button == 1) {
+      new_menu = current->goBack();
+      Serial.println(1);
+    } else if (button == 2) {
+      new_menu = current->goDown();
+      Serial.println(2);
+    } else if (button == 3) {
+      new_menu = current->goRight();
+      Serial.println(3);
+    }
+    if (new_menu != NULL) {
+      current = new_menu;
+    }
+    displayMenu();
+
+    Serial.flush();
+  }
+}
\ No newline at end of file