Sentence:  It was all set up so there would <WSD>be</WSD> no dust anywhere and so that their children would color in the coloring room , paint in the painting room , play with blocks in the block house , and do all the other things in the proper rooms at exactly the right time . 
Meaning of the word marked with <WSD> tags:  happen, occur, take place; this was during the visit to my parents' house"