Make Sulfur Cube Interact With Redstone And Some Extra Things

Make them be able to hold redstone lamps that go off when they either touch redstone or you hit them.

Make them have note blocks so when you hit them it plays a unique sound.

Make them have TNT that goes off on impact.

Make them carry barrels for early game transportation.

When you lead them they should do the same animation as the April fools snapshot on how they roll around which would make them super cool.