How to craft fireworks with explosions Minecraft Creative?

Creating fireworks in creative mode and survival is generally the same thing. All you need to do is spawn in a crafting table and the right materials. It may be that you aren't using the correct version of Minecraft. As far as I know, fireworks have been around since 1.4.6. Of the Computer edition of Minecraft. If you don't know HOW to make fireworks, I advice checking the wiki. It is hard to explain.
http://minecraft.gamepedia.com/.../Fireworks

Download the too many items mod.

It helps a lot with creating fireworks.