Fizzing, Soapy Shape for the Tub
Puzzle 6 of All Things Ice Cream Easy Pack
Question is: Fizzing, Soapy Shape for the Tub
and the answer is: BATHBOMB
Word Meaning:
BATH BOMB — A hard-packed mixture of chemicals which effervesces when wet, used to add scent and colour to bathwater.
Definitions from Wiktionary.