You can't really "make" a planet in the way you might make a cake. Planets form over millions of years through a complex process. But here's what you *need* to get that process started:

1. A Giant Cloud of Dust and Gas: This is called a nebula. It's the raw material for everything, from stars to planets.

2. Gravity: Gravity pulls the dust and gas particles together, making them clump up and form larger objects.

3. Time: Over millions of years, these clumps grow bigger and bigger, eventually becoming large enough to be called planets.

4. A Little Bit of Luck: There are a lot of factors that affect how a planet forms, and a lot of things can go wrong. Some nebulae never form planets, and some planets are destroyed before they can fully develop.

So, to "make" a planet you need:

* A vast amount of material

* Gravity to pull it all together

* Time for it to accumulate and form

* A little bit of cosmic luck

It's important to note that even with all of this, making a planet is a very complex and unpredictable process.