diff --git a/ethereum/ethereum.go b/ethereum/ethereum.go
index 04933ef8e..1cbb61002 100644
--- a/ethereum/ethereum.go
+++ b/ethereum/ethereum.go
@@ -15,16 +15,15 @@ import (
 
 const Debug = true
 
-// Register interrupt handlers so we can stop the ethereum
-func RegisterInterrupts(s *eth.Ethereum) {
-	// Buffered chan of one is enough
-	c := make(chan os.Signal, 1)
-	// Notify about interrupts for now
-	signal.Notify(c, os.Interrupt)
+func RegisterInterrupt(cb func(os.Signal)) {
 	go func() {
+		// Buffered chan of one is enough
+		c := make(chan os.Signal, 1)
+		// Notify about interrupts for now
+		signal.Notify(c, os.Interrupt)
+
 		for sig := range c {
-			fmt.Printf("Shutting down (%v) ... \n", sig)
-			s.Stop()
+			cb(sig)
 		}
 	}()
 }
@@ -154,13 +153,20 @@ save these words so you can restore your account later: %s
 		repl := NewJSRepl(ethereum)
 
 		go repl.Start()
+
+		RegisterInterrupt(func(os.Signal) {
+			repl.Stop()
+		})
 	}
 
 	if StartRpc {
 		utils.DoRpc(ethereum, RpcPort)
 	}
 
-	RegisterInterrupts(ethereum)
+	RegisterInterrupt(func(sig os.Signal) {
+		fmt.Printf("Shutting down (%v) ... \n", sig)
+		ethereum.Stop()
+	})
 
 	ethereum.Start(UseSeed)
 
diff --git a/ethereum/javascript_console.go b/ethereum/javascript_console.go
index 1e1ae0e48..07d69dafc 100644
--- a/ethereum/javascript_console.go
+++ b/ethereum/javascript_console.go
@@ -11,6 +11,7 @@ import (
 
 type Repl interface {
 	Start()
+	Stop()
 }
 
 type JSRE struct {
@@ -36,6 +37,9 @@ func NewJSRE(ethereum *eth.Ethereum) *JSRE {
 		make(map[string][]otto.Value),
 	}
 
+	// Init the JS lib
+	re.vm.Run(jsLib)
+
 	// We have to make sure that, whoever calls this, calls "Stop"
 	go re.mainLoop()
 
@@ -113,6 +117,10 @@ func (self *JSRepl) Start() {
 	self.read()
 }
 
+func (self *JSRepl) Stop() {
+	self.re.Stop()
+}
+
 func (self *JSRepl) parseInput(code string) {
 	defer func() {
 		if r := recover(); r != nil {
@@ -126,7 +134,7 @@ func (self *JSRepl) parseInput(code string) {
 		return
 	}
 
-	fmt.Println(value)
+	self.PrintValue(value)
 }
 
 // The JSEthereum object attempts to wrap the PEthereum object and returns
diff --git a/ethereum/js_lib.go b/ethereum/js_lib.go
new file mode 100644
index 000000000..8b59d75ca
--- /dev/null
+++ b/ethereum/js_lib.go
@@ -0,0 +1,46 @@
+package main
+
+const jsLib = `
+function pp(object) {
+    var str = "";
+
+    if(object instanceof Array) {
+        str += "[ ";
+        for(var i = 0, l = object.length; i < l; i++) {
+            str += pp(object[i]);
+
+            if(i < l-1) {
+                str += ", ";
+            }
+        }
+        str += " ]";
+    } else if(typeof(object) === "object") {
+        str += "{ ";
+        var last = Object.keys(object).sort().pop()
+        for(var k in object) {
+            str += k + ": " + pp(object[k]);
+
+            if(k !== last) {
+                str += ", ";
+            }
+        }
+        str += " }";
+    } else if(typeof(object) === "string") {
+        str += "\033[32m'" + object + "'";
+    } else if(typeof(object) === "undefined") {
+        str += "\033[1m\033[30m" + object;
+    } else if(typeof(object) === "number") {
+        str += "\033[31m" + object;
+    } else {
+        str += object;                    
+    }
+
+    str += "\033[0m";
+
+    return str;
+}
+
+function prettyPrint(object) {
+    console.log(pp(object))
+}
+`
diff --git a/ethereum/repl_darwin.go b/ethereum/repl_darwin.go
index 483d4cedf..87da3df1d 100644
--- a/ethereum/repl_darwin.go
+++ b/ethereum/repl_darwin.go
@@ -8,6 +8,7 @@ package main
 import "C"
 
 import (
+	"github.com/robertkrimen/otto"
 	"strings"
 	"unsafe"
 )
@@ -63,18 +64,30 @@ L:
 	for {
 		switch result := readLine(&self.prompt); true {
 		case result == nil:
-			break L //exit loop
+			break L
 
-		case *result != "": //ignore blank lines
+		case *result != "":
 			str += *result + "\n"
 
 			self.setIndent()
 
 			if indentCount <= 0 {
+				if *result == "exit" {
+					self.Stop()
+					break L
+				}
+
 				addHistory(str) //allow user to recall this line
 
 				self.parseInput(str)
+
+				str = ""
 			}
 		}
 	}
 }
+
+func (self *JSRepl) PrintValue(value otto.Value) {
+	method, _ := self.re.vm.Get("prettyPrint")
+	method.Call(method, value)
+}
diff --git a/ethereum/repl_windows.go b/ethereum/repl_windows.go
index c42fd6e6a..9d4787772 100644
--- a/ethereum/repl_windows.go
+++ b/ethereum/repl_windows.go
@@ -18,3 +18,7 @@ func (self *JSRepl) read() {
 		}
 	}
 }
+
+func (self *JSRepl) PrintValue(value otto.Value) {
+	fmt.Println(value)
+}