Answer:

balloons

Answer	Crossword Clue
BALLOONS	Party poppers
BALLOONS	Party decorations
BALLOONS	They may be sent up in trials

BALLOONS	Puffs out
BALLOONS	Clowns' toys
BALLOONS	Swells up
BALLOONS	Gets bloated
BALLOONS	Some party decorations
BALLOONS	Malcolm Forbes' collection

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.