Glue

Glue is a sticky substance, in the third episode, Holly, Lizzie, and Jordan was in it

Names
Gooey, Marshmallow stuff (Jordan)

Marshmallow like (Lizzie)

Quicksand (Holly) STICKY QUICKSAND! (Jordan)

Trivia

 * This quicksand was featured in QUICKsand the sequels part 3 as a modified version of itself
 * It was seen in PLOT twist in the thumbnail, Here is what I knew:
 * ‘At 4:27 or on another time stamp, it said “ShmickleTV sticking plastic toys in slime since November 27, I think” meaning that they were sent there for no reason
 * It said plot twist because they did not escape so they died
 * It was taken down for being too dark