Guide To Objects In Creation Mode:

Dissolve material: dissolves itself if you connect a sensor or switch to it.

Floaty material: material that floats by itself or if tethered with

Cardboard/wood/metal material: regular material that can be used to make anything.

Sponge material: material that can be grabbed with (R1) and can be used to make cars move and rockets fly etc.

Rubber material: work super well with making wheels for vehicles because it goes faster than other materials for vehicle wheel.

Dark matter material: material stays still in midair without falling even if you unpause it.