The new Dawn Spin Brush for dishes... (almost anywhere, best on feet)
A nice stiff feather... (good for between the toes, belly button, underarms, and genital and/or bum tickling)
Car keys... (on feet)
Pipe Cleaners... (between toes and belly button)
Sonicare toothbrush w/attachments... (actually, any electric dental kit sold at like Walmart that has the little skinny between teeth attachment, the tongue scraper, and other misc attachments will do. All the attachments work on a variety of body parts)
Plastic tip hair brushes... (feet)
Back scratchers... (anywhere with the right touch)
And lots more, but I will restrain and let others contribute..lol
Mimi 🙂