Aspiring writer Sarah Quinn (Madison Iseman) is struggling with her college entry essay. Her boyfriend just wants to have fun. Her nerdy brother Sonny (Jeremy Ray Taylor) annoys her. He and his best friend Sam Carter (Caleel Harris) have started a junk business. They are called to clean out the abandoned childhood home of R.L. Stine (Jack Black). They find Stine's book. Ventriloquist dummy Slappy suddenly appears and Sonny unknowingly brings him back to life. Slappy wants to be a part of his family unleashing chaos during Halloween.
This is pretty good for a TV Goosebumps movie on a kiddie channel. As a theatrical offering, it doesn't have the grandeur or the scares to cross over into adult or teen market. In addition, it's tough to sell parents to take their little kids to a horror movie. It's stuck somewhere in no man's land. It needs to be a little darker and a little more theatrical to get the teens. Jack Black phones in his fifteen minutes and delivers one good joke. The kids are fine but nothing that special. The writing misses a few things. Sarah needs to physically write in the book with a pen to wrap up that aspect of the story. Slappy is interesting and could deliver more sequels. The franchise is unlikely to break out and is probably on a declining trajectory. It's stuck in kiddie horror land.