escape the museum 2 level 27

hot spot at bench instead of where it is supposed to be having trouble getting wrench , that it tells me i need . sparkles won't leave bench area. what do I do to move forward? wb4myd

Was stuck there too. You have to click on the mat on the platform next to the train, that gives you a hidden object scene, which gets you a tool to cut the mat. Use the mat on the train to get the wrench - and then use the wrench to unscrew the bench.