I've been thinking about what could be added to the Powder Toy, and I thought about exploring the potential of Semiconductors, which can be explored further.
They could add some semiconductor elements.
GERM
Germanium, semi-conductor, uses the electrical conduction speed, which can be changed in commands.
Melting Point: 1211.35K
It breaks with pressure upward 10
SILI
Silicon, semi-conductor, can be used as a substrate.
Melting Point: 1687,15K