Sentence:  It can be tricky to get the edges <WSD>stuck together</WSD> neatly. Alternatively, you can pinch them upward like a ruffled pie crust edge. When all the edges are <WSD>stuck together</WSD>, poke the straw into the little hole in the top where the points meet, and blow so the box inflates. 
Meaning of the word marked with <WSD> tags:  To physically combine by adhesion.