multiple 1.5v devices from one 9v power supply
No. They don't draw constant current, when they "tick" they draw several mA.

If 5 of them "tick" at the same time, there will be practically 9V across the 6th. That won't do it any good.

But more likely, when one tries to tick, the other 5 will prevent it getting enough current.

Either way ... no.