You might need:

Schwarzkopf Junior Hairspray
This one is really good. I use this one, it works all day and you can easily comb it out of your hair.

Folica Hot Tools Professional Spring Curling Iron
Click here to purchase
And they’re cheap as well. Definitely a recommendation.

Buy Hair Clip In Hair Extensions Highlights & Streaks
Click here to purchase
They are relatively cheap and they have many colors available. If the extensions are too long for your hair, you can always cut them.

I will explain this using a blue extension. You can try out this look with many different colors. This is quite an easy tutorial.

1. Some people will already know this, but I won’t skip it. When clipping in extensions, always do it under a layer of hair, otherwise it will look very stupid and unnatural.  If you do it like this it will look natural.

2. Once you have clipped in all your extensions, take your curling iron and grab a lock of your own hair and one extension. For tutorial image purposes I have started with a lock from the top of my head with the hair extension. Do not do this! When curling your hair for this tutorial begin with the under-section of your hair and curl your way up to the top.

3. Open the curling iron and release the curls. Do this with your whole hair! After you’re done, I would advise you to put some hairspray on each curl. This keeps the extension and normal hair curl on their place with each other and helps maintaining the look.

Good luck!