How do I spawn completely randomly

I'm making a launch game where you just see how far you can launch your hero. I have a bunch of different objects that launch you further, give you power ups, do cool stuff, etc...

I'd just like to have one layout that spawns these objects randomly each time you load it, or as you play it. It's more of a high score game and I'd rather not have to build a giant map myself especially when it's going to get boring if it's the same thing every time.

You can change the random ranges to effect both quantity and placement. It's different every time the layout loads.