also: くうきふくろ
このおもちゃの空気袋に空気を入れてください。
Please inflate this toy's air bag.
エアバッグ is the common loanword for a vehicle airbag; 空気袋 is not typically used for car safety devices.
Standard kanji spelling. The reading くうきぶくろ is the most common pronunciation.
Alternate reading くうきふくろ is less common but recognized.
Compound of 空気 (air) and 袋 (bag, sack). The reading くうきぶくろ uses rendaku voicing on ふくろ, while くうきふくろ retains the unvoiced form.