Have you ever wanted have more tnt stronger tnt? Well this addon has that gives you 51 tnts plus grenades replacing ender pearls, molotov replacing snowballs and explosive arrows replacing arrows.
The tnts we have are (by the way the tnt in middle is look of some tnts).

The new TNT's also cannot be broken as they are technically entities, However, If you break the blocks surrounding it, making it float, It will teleport in a random direction away from where it originally was. This is just in case you accidentally place it in an area you do not want it to be in.

Since the TNT technically isn't a block, That also means you cannot place blocks specifically on top of the TNT, It must be placed with support from another.

As I mentioned, The new TNT's are entities. This also means it is found in the spawn eggs section of the creative menu. Sadly it isn't organised properly.

Disclaimer: This is an unofficial app for Minecraft Pocket Edition. This app is not affiliated in any way with Mojang AB. The name, brand and assets are the property of Mojang AB or its respectful owner.