At my workplace give away, I found a bunch of sensors for free ( sunfounders kit ) .. unfortunately the box that contains more than 20 sensors did not have a resistor in it. I wish to connect a few sensors namely ( temperature sensor , photo resistor ), but connecting them to the rasp pi via breadboard without a resistor, do you think could cause something to blow up in my rasp pi ?

I don't want to destroy my rasp pi. Any help is appreciated. Thank you