diff --git a/.travis.yml b/.travis.yml
index dff5f3a..45e9d6b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1 +1,4 @@
 language: java
+
+jdk:
+  - oraclejdk8
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..6f25b3b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,4 @@
+jax-ftd-day-4-java-assignment
+===
+
+[![Build Status](https://travis-ci.org/Tylhandras/jax-ftd-day-4-java-assignment.svg?branch=master)](https://travis-ci.org/Tylhandras/jax-ftd-day-4-java-assignment)
diff --git a/src/main/java/com/cooksys/butterpillar/model/Butterpillar.java b/src/main/java/com/cooksys/butterpillar/model/Butterpillar.java
index 1060573..7183b47 100644
--- a/src/main/java/com/cooksys/butterpillar/model/Butterpillar.java
+++ b/src/main/java/com/cooksys/butterpillar/model/Butterpillar.java
@@ -2,31 +2,37 @@
 
 public class Butterpillar {
 	
-	// any instance fields should be private
+	private double length;
+	private double leavesEaten;
 
 	public double getLength() {
-		return 0; // TODO: to be implemented
+		return length;
 	}
 
 	public void setLength(double length) {
-		// TODO: to be implemented
+		this.length = length;
 	}
 
 	public double getLeavesEaten() {
-		return 0; // TODO: to be implemented
+		return leavesEaten;
 	}
 
 	public void setLeavesEaten(double leavesEaten) {
-		// TODO: to be implemented
+		this.leavesEaten = leavesEaten;
 	}
 	
 	public boolean equals(Butterpillar b) {
-		return false; // TODO: to be implemented
+		if (this.length == b.getLength() && this.leavesEaten == b.getLeavesEaten())
+			return true;
+		
+		return false;
 	}
 	
 	@Override
 	public String toString() {
-		return null; // TODO: to be implemented
+		String output = String.format("Butterpillar: Length: %d   Leaves Eaten: %d", this.length, this.leavesEaten);
+		
+		return output;
 	}
 	
 	@Override
diff --git a/src/main/java/com/cooksys/butterpillar/model/Catterfly.java b/src/main/java/com/cooksys/butterpillar/model/Catterfly.java
index 81ff09a..eb714a1 100644
--- a/src/main/java/com/cooksys/butterpillar/model/Catterfly.java
+++ b/src/main/java/com/cooksys/butterpillar/model/Catterfly.java
@@ -2,31 +2,37 @@
 
 public class Catterfly {
 	
-	// any instance fields should be private
+	private double wingspan;
+	private double weight;
 
 	public double getWingspan() {
-		return 0; // to be implemented
+		return wingspan;
 	}
 
 	public void setWingspan(double wingspan) {
-		// to be implemented
+		this.wingspan = wingspan;
 	}
 
 	public double getWeight() {
-		return 0; // TODO: to be implemented
+		return weight;
 	}
 
 	public void setWeight(double weight) {
-		// TODO: to be implemented
+		this.weight = weight;
 	}
 	
 	public boolean equals(Catterfly c) {
-		return false; // TODO: to be implemented
+		if (this.wingspan == c.getWingspan() && this.weight == c.getWeight())
+			return true;
+		
+		return false;
 	}
 	
 	@Override
 	public String toString() {
-		return null; // TODO: to be implemented
+		String output = String.format("Catterfly: Wingspan: %d   Weight: %d", this.wingspan, this.weight);
+		
+		return output;
 	}
 	
 	@Override
diff --git a/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java b/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java
index 3f034fd..bd4077f 100644
--- a/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java
+++ b/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java
@@ -2,39 +2,55 @@
 
 public class GrowthModel {
 
-	// any instance fields should be private
+	private double lengthToWingspan;
+	private double leavesEatenToWeight;
 
 	public double getLengthToWingspan() {
-		return 0; // to be implemented
+		return lengthToWingspan;
 	}
 
 	public void setLengthToWingspan(double lengthToWingspan) {
-		// to be implemented
+		this.lengthToWingspan = lengthToWingspan;
 	}
 
 	public double getLeavesEatenToWeight() {
-		return 0; // to be implemented
+		return leavesEatenToWeight;
 	}
 
 	public void setLeavesEatenToWeight(double leavesEatenToWeight) {
-		// to be implemented
+		this.leavesEatenToWeight = leavesEatenToWeight;
 	}
 
 	public Catterfly butterpillarToCatterfly(Butterpillar butterpillar) {
-		return null; // to be implemented
+		Catterfly temp = new Catterfly();
+		
+		temp.setWeight(butterpillar.getLeavesEaten() * leavesEatenToWeight);
+		temp.setWingspan(butterpillar.getLength() * lengthToWingspan);
+		
+		return temp;
 	}
 
 	public Butterpillar catterflyToButterpillar(Catterfly catterfly) {
-		return null; // to be implemented
+		Butterpillar temp = new Butterpillar();
+		
+		temp.setLeavesEaten(catterfly.getWeight() / leavesEatenToWeight);
+		temp.setLength(catterfly.getWingspan() / lengthToWingspan);
+		
+		return temp;
 	}
 	
 	public boolean equals(GrowthModel g) {
-		return false; // TODO: to be implemented
+		if (this.lengthToWingspan == g.getLengthToWingspan() && this.leavesEatenToWeight == g.getLeavesEatenToWeight())
+			return true;
+		
+		return false;
 	}
 	
 	@Override
 	public String toString() {
-		return null; // TODO: to be implemented
+		String output = String.format("Growth Model: Length Ratio: %d   Weight Ratio: %d", this.lengthToWingspan, this.leavesEatenToWeight);
+		
+		return output;
 	}
 	
 	@Override