diff --git a/src/main.rs b/src/main.rs
index ab4d792..661df3c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,5 @@
-extern crate ncurses;
 extern crate downcast_rs;
+extern crate ncurses;
 
 use ncurses::*;
 use rand::seq::SliceRandom;
@@ -76,42 +76,27 @@ impl World {
     }
 }
 
-use downcast_rs::{Downcast, impl_downcast};
+use downcast_rs::{impl_downcast, Downcast};
 
 trait Entity: AI + Renderable + Downcast {}
 impl_downcast!(Entity);
 
-struct Colony {
-    ants: HashMap<u32, Box<dyn Entity>>,
-    id_counter: u32,
-}
-
-impl Colony {
-    fn new() -> Colony {
-        Colony {
-            ants: HashMap::new(),
-            id_counter: 0,
-        }
-    }
-
-    fn add_entity<T: Entity + 'static>(&mut self, e: T) {
-        self.ants.insert(self.id_counter, Box::new(e));
-        self.id_counter += 1;
-    }
-}
-
 trait AI {
-    fn step(&mut self, id: u32, b: &Board, w: &World) -> BoardCommand;
+    fn step(&mut self, b: &Board, w: &World) -> BoardCommand;
     fn get_position(&self) -> Point;
 }
 
 struct Ant {
     pos: Point,
+    id: u32,
 }
 
 impl Ant {
-    fn new(x: i32, y: i32) -> Ant {
-        Ant { pos: Point(x, y) }
+    fn new(x: i32, y: i32, id: u32) -> Ant {
+        Ant {
+            pos: Point(x, y),
+            id,
+        }
     }
 }
 
@@ -126,6 +111,7 @@ impl Renderable for Ant {
 struct Queen {
     pos: Point,
     egg_count: u8,
+    id: u32,
 }
 
 impl Renderable for Queen {
@@ -141,10 +127,11 @@ trait Renderable {
 }
 
 impl Queen {
-    fn new(x: i32, y: i32) -> Queen {
+    fn new(x: i32, y: i32, id: u32) -> Queen {
         Queen {
             pos: Point(x, y),
             egg_count: 0,
+            id,
         }
     }
 }
@@ -153,7 +140,8 @@ impl Queen {
 struct Egg {
     pos: Point,
     counter: u8,
-    queen_id: u32
+    queen_id: u32,
+    id: u32,
 }
 
 impl Renderable for Egg {
@@ -163,22 +151,23 @@ impl Renderable for Egg {
 }
 
 impl Egg {
-    fn new(x: i32, y: i32, queen_id: u32) -> Egg {
+    fn new(x: i32, y: i32, id: u32, queen_id: u32) -> Egg {
         Egg {
             pos: Point(x, y),
             counter: 10,
-            queen_id
+            id,
+            queen_id,
         }
     }
 }
 
 impl AI for Egg {
-    fn step(&mut self, id: u32, b: &Board, w: &World) -> BoardCommand {
+    fn step(&mut self, b: &Board, w: &World) -> BoardCommand {
         if self.counter > 0 {
             self.counter -= 1;
             return BoardCommand::Noop;
         } else {
-            BoardCommand::Hatch(id, self.queen_id)
+            BoardCommand::Hatch(self.id, self.queen_id)
         }
     }
 
@@ -199,7 +188,7 @@ impl AI for Ant {
         self.pos.clone()
     }
     // return the next move for this ant
-    fn step(&mut self, id: u32, b: &Board, w: &World) -> BoardCommand {
+    fn step(&mut self, b: &Board, w: &World) -> BoardCommand {
         let valid = w.get_valid_movements(&self.pos, b);
         let mut rng = thread_rng();
 
@@ -226,7 +215,7 @@ impl AI for Queen {
     fn get_position(&self) -> Point {
         self.pos.clone()
     }
-    fn step(&mut self, id: u32, b: &Board, w: &World) -> BoardCommand {
+    fn step(&mut self, b: &Board, w: &World) -> BoardCommand {
         let valid: Vec<Point> = w.get_valid_movements(&self.pos, b);
         let mut rng = thread_rng();
 
@@ -240,7 +229,7 @@ impl AI for Queen {
                 // choose between laying an egg and moving
                 if self.egg_count < 3 {
                     self.egg_count += 1;
-                    return BoardCommand::LayEgg(pos, id);
+                    return BoardCommand::LayEgg(pos, self.id);
                 } else {
                     self.pos = pos;
                     return BoardCommand::Noop;
@@ -252,12 +241,12 @@ impl AI for Queen {
     }
 }
 
-fn render(c: &Colony, w: &World, b: &Board) {
+fn render(e: &Entities, w: &World, b: &Board) {
     for c in w.cleared.iter() {
         mvprintw(c.1 + b.center.1, c.0 + b.center.0, "x");
     }
 
-    for a in c.ants.values() {
+    for a in e.data.values() {
         let pos = a.get_position();
         mvprintw(pos.1 + b.center.1, pos.0 + b.center.0, a.render());
     }
@@ -281,8 +270,12 @@ mod tests {
     }
 }
 
-fn simulate(c: &mut Colony, w: &mut World, b: &mut Board) {
-    let cmds: Vec<BoardCommand> = c.ants.iter_mut().map(|(id, a)| a.step(*id, b, &w)).collect();
+fn simulate(e: &mut Entities, w: &mut World, b: &mut Board) {
+    let cmds: Vec<BoardCommand> = e
+        .data
+        .values_mut()
+        .map(|a| a.step(b, &w))
+        .collect();
 
     for cmd in cmds {
         match cmd {
@@ -290,22 +283,60 @@ fn simulate(c: &mut Colony, w: &mut World, b: &mut Board) {
                 w.clear(pos);
             }
             BoardCommand::LayEgg(pos, id) => {
-                c.add_entity(Egg::new(pos.0, pos.1, id));
+                e.add_egg(pos.0, pos.1, id);
             }
             BoardCommand::Hatch(egg_id, queen_id) => {
-                let egg = c.ants.remove(&egg_id);
+                let egg = e.data.remove(&egg_id);
                 let pos = egg.unwrap().get_position();
 
-                let q = c.ants.get_mut(&queen_id).unwrap();
+                let q = e.data.get_mut(&queen_id).unwrap();
                 let queen: &mut Queen = q.downcast_mut::<Queen>().unwrap();
                 queen.egg_count -= 1;
-                c.add_entity(Ant::new(pos.0, pos.1));
+                e.add_ant(pos.0, pos.1);
             }
             BoardCommand::Noop => {}
         }
     }
     w.occupied.clear();
-    let _ = c.ants.values().map(|p| w.occupied.insert(p.get_position()));
+    let _ = e.data.values().map(|p| w.occupied.insert(p.get_position()));
+}
+
+struct Entities {
+    data: HashMap<u32, Box<dyn Entity>>,
+    id_counter: u32,
+}
+
+impl Entities {
+    fn new() -> Entities {
+        Entities {
+            id_counter: 0,
+            data: HashMap::new(),
+        }
+    }
+
+    fn add_ant(&mut self, x: i32, y: i32) -> u32 {
+        let a = Ant::new(x, y, self.id_counter);
+        let id = a.id;
+        self.data.insert(a.id, Box::new(a));
+        self.id_counter += 1;
+        id
+    }
+
+    fn add_queen(&mut self, x: i32, y: i32) -> u32 {
+        let q = Queen::new(x, y, self.id_counter);
+        let id = q.id;
+        self.data.insert(q.id, Box::new(q));
+        self.id_counter += 1;
+        id
+    }
+
+    fn add_egg(&mut self, x: i32, y: i32, queen_id: u32) -> u32 {
+        let e = Egg::new(x, y, self.id_counter, queen_id);
+        let id = e.id;
+        self.data.insert(e.id, Box::new(e));
+        self.id_counter += 1;
+        id
+    }
 }
 
 fn main() {
@@ -321,13 +352,16 @@ fn main() {
 
     // might move all of contents of board into world
 
+    // TODO: rename board to screen -> will keep track of where we are looking at in the world
+    // TODO: create entity factory to build new entities, will make it easier to have multiple
+    // colonies because no ids will ever overlap
+    // TODO: fix renderable to render different colors
+
     let mut board = Board::new(max_x, max_y);
     let mut world = World::new();
-    
-    let q = Queen::new(0,0);
 
-    let mut colony = Colony::new();
-    colony.add_entity(q);
+    let mut entities = Entities::new();
+    entities.add_queen(0,0);
 
     for i in -3..3 {
         for j in -3..3 {
@@ -337,8 +371,8 @@ fn main() {
 
     loop {
         // TODO: add way to break out of the loop by hitting a random key
-        simulate(&mut colony, &mut world, &mut board);
-        render(&colony, &world, &board);
+        simulate(&mut entities, &mut world, &mut board);
+        render(&entities, &world, &board);
         sleep(time::Duration::from_millis(100));
         refresh();
     }