diff --git a/.travis.yml b/.travis.yml
index dff5f3a..9bcf999 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1 +1,3 @@
 language: java
+jdk:
+  - oraclejdk8
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..a0c1f01
--- /dev/null
+++ b/README.md
@@ -0,0 +1,4 @@
+jax-ftd-day-4-java-assignment
+===
+
+[![Build Status](https://travis-ci.org/njvsvalhalla/jax-ftd-day-4-java-assignment.svg?branch=njvsvalhalla)](https://travis-ci.org/njvsvalhalla/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..6b4cefb 100644
--- a/src/main/java/com/cooksys/butterpillar/model/Butterpillar.java
+++ b/src/main/java/com/cooksys/butterpillar/model/Butterpillar.java
@@ -3,30 +3,42 @@
 public class Butterpillar {
 	
 	// any instance fields should be private
+	private double length;
+	private double leavesEaten;
+	public Butterpillar() {
 
+	}
+
+	public Butterpillar(double length, double leavesEaten) {
+		super();
+		this.length = length;
+		this.leavesEaten = 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 (b.leavesEaten == this.leavesEaten && b.length == this.length) { return true; }
+		else { return false; }
 	}
 	
 	@Override
 	public String toString() {
-		return null; // TODO: to be implemented
+		String s = "Butterpillar leavesEaten = " + leavesEaten + ", Length: " + length;
+		return s;
 	}
 	
 	@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..19d746b 100644
--- a/src/main/java/com/cooksys/butterpillar/model/Catterfly.java
+++ b/src/main/java/com/cooksys/butterpillar/model/Catterfly.java
@@ -3,30 +3,43 @@
 public class Catterfly {
 	
 	// any instance fields should be private
+	private double wingspan;
+	private double weight;
+	
+	public Catterfly() {
+	}
+
+	public Catterfly(double wingspan, double weight) {
+		super();
+		this.wingspan = wingspan;
+		this.weight = 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.weight == c.weight && this.wingspan == c.wingspan) { return true; }
+		else return false;
 	}
 	
 	@Override
 	public String toString() {
-		return null; // TODO: to be implemented
+		String s = "Catterfly wingspan = " + wingspan + ", Weight: " + weight;
+		return s;
 	}
 	
 	@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..504c2a9 100644
--- a/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java
+++ b/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java
@@ -3,40 +3,54 @@
 public class GrowthModel {
 
 	// any instance fields should be private
+	private double lengthToWingspan;
+	private double leavesEatenToWeight;
+
+	public GrowthModel() {
+
+	}
 
 	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
+		return new Catterfly(this.lengthToWingspan * butterpillar.getLength(),
+				this.leavesEatenToWeight * butterpillar.getLeavesEaten());
 	}
 
 	public Butterpillar catterflyToButterpillar(Catterfly catterfly) {
-		return null; // to be implemented
+		return new Butterpillar(catterfly.getWingspan() / this.getLengthToWingspan(),
+				catterfly.getWeight() / this.getLeavesEatenToWeight());
 	}
-	
+
 	public boolean equals(GrowthModel g) {
-		return false; // TODO: to be implemented
+		if (this.leavesEatenToWeight == g.leavesEatenToWeight && this.lengthToWingspan == g.lengthToWingspan) {
+			return true;
+		} else {
+			return false;
+		}
 	}
-	
+
 	@Override
 	public String toString() {
-		return null; // TODO: to be implemented
+		String s = "GrowthModel lengthToWingspan = " + lengthToWingspan + ", leavesEatenToWeight: "
+				+ leavesEatenToWeight;
+		return s;
 	}
-	
+
 	@Override
 	public boolean equals(Object o) {
 		if (o instanceof GrowthModel) {