How to Make a Language Using Phonemic Inventory Sounds

He suggests we define the basic phonemic inventory and tell people to go nuts with it. He says, also I have a suggestion, since my last suggestion caused what sounded like a lively debate,. It would be need to put out a sound chart and ask people to make a language using those sounds. Then you guys either create one as a show or separately create one. You can compare all the madness and wonderful craziness that can be done with just a simple phonology. Could be a lot of fun.