Sentence:  Pale yellow snapdragons that by pinching could be made to bite ; seed-pods of the balsams that snapped like fire-crackers at a touch ; red and yellow columbines whose round tipped spurs were picked off and eaten for the honey in them ; morning-glory buds which could be so grasped and squeezed that they burst like a blown-up <WSD>paper</WSD> bag ; bright flowers from the trumpet vine that made `` gloves '' on the ends of ten waggling fingers . 
Meaning of the word marked with <WSD> tags:  a bag made of paper or plastic for holding customer's purchases