I feel so girly rolling my hair up in bendy rollers in front of it. Remember them? I bought a pack of 6 from an op shop for $1 AUD but you can still get them in Boots.
For wavy curls, I use two at a time trapping the ends of my hair in between and I roll upwards. They stay secure while I'm sleeping and by morning, I have curls! No heat required and they last until I wash my hair. How's that for old fashioned hair tricks?