the sculpture guy (after you give him potato chips). you have to leave and come back to talk to him. ask him everything and he'll keep dropping flowers (up to 3 i believe)
flowers (from the sculpture guy). use potato chips on him first if he's still chasing you. then you can use the flowers on the chemistry set with the rest of the items
Is going through the locked gate the only path available in the demo? still haven't been able to find the blue light or where to use some items like the stone curse cure