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 paper bag ; bright flowers from the trumpet vine that made "gloves" on the ends of ten waggling fingers .