diff --git a/NinjaSwiftChallenges.playground/Contents.swift b/NinjaSwiftChallenges.playground/Contents.swift
new file mode 100644
index 0000000..d3b65cd
--- /dev/null
+++ b/NinjaSwiftChallenges.playground/Contents.swift
@@ -0,0 +1,39 @@
+//: Playground - noun: a place where people can play
+
+import UIKit
+
+// Challenge 1
+func swap<Type>(inout a: Type, inout b: Type){
+    (a, b) = (b, a)
+}
+
+// Challenge 2
+func flexStrings(s1: String = "", s2: String = "") -> String{
+    return s1 + s2 == "" ? "none": s1 + s2
+}
+
+// Challenge 3
+func sumAny(anyValues: Any...) -> String{
+    return String((anyValues.map({item in
+        switch item {
+        case "" as String, 0 as Int:
+            return -10
+        case let s as String where Int(s) > 0:
+            return Int(s)!
+        case is Int:
+            return item as! Int
+        default:
+            return 0
+        }
+    }) as [Int]).reduce(0) {
+        $0 + $1
+        })
+}
+
+// Challenge 4
+func countFrom(from: Int, to: Int){
+    print(from)
+    if from != to {
+        countFrom(from + 1, to: to)
+    }
+}
diff --git a/NinjaSwiftChallenges.playground/contents.xcplayground b/NinjaSwiftChallenges.playground/contents.xcplayground
new file mode 100644
index 0000000..5da2641
--- /dev/null
+++ b/NinjaSwiftChallenges.playground/contents.xcplayground
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='ios'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>
\ No newline at end of file
diff --git a/NinjaSwiftChallenges.playground/playground.xcworkspace/contents.xcworkspacedata b/NinjaSwiftChallenges.playground/playground.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..919434a
--- /dev/null
+++ b/NinjaSwiftChallenges.playground/playground.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>
diff --git a/NinjaSwiftChallenges.playground/playground.xcworkspace/xcuserdata/joesalter.xcuserdatad/UserInterfaceState.xcuserstate b/NinjaSwiftChallenges.playground/playground.xcworkspace/xcuserdata/joesalter.xcuserdatad/UserInterfaceState.xcuserstate
new file mode 100644
index 0000000..af80c78
Binary files /dev/null and b/NinjaSwiftChallenges.playground/playground.xcworkspace/xcuserdata/joesalter.xcuserdatad/UserInterfaceState.xcuserstate differ