So i asked myself:

If we as a technologically developed civilization were caught up in a situation in which we were forced to slowly lead the inhabitants of the sentinel island to our current state of affairs... how would we do it?

In which order would we expose them to technology? Would we start with something as simple as the wheel? Fire?
Would we then just drop a steam engine on the island to see them figure it out?
Would we expose them somehow to the principles of physics and chemistry?

What would be the ideal order of disclosure given an almost infinite timeline?

At what stage would we reveal ourselfes?