The Chalk Portals

For a science project on hypnotism, Margaret Lisman and Sydney Welhounse draw black and white spirals on Professor Hartwick's board. What they find are portals to rooms, different each time. For a laugh, they drag Sydney's cousin Anthony Pedderman and Margaret's enemy Sam Tutlered to the rooms. What they don't know is the rooms are guarded by a ghost who has something to do with the room. Some are good, some aren't.