Elsa unintentionally reveals her ice powers when Anna takes off one of her gloves. She runs away from the townspeople after a series of accidents so as not to cause more harm and lose more of the trust of her fellow townspeople.
Beakman creates a jello mold and explains the science behind how it solidifies. Since gelatin is made from animal bones, it contains collagen. When heated, it breaks apart, but when it cools it creates a matrix that traps the liquid which makes the jello consistency.
Senku and his comrades decide to upgrade their tank by making paper. They gather lots of weed and boil it with sodium hydroxide to turn it into goo. They then press and dry it in the sun to solidify paper.