fidget toy 3d model

Design a single-piece fully 3D printable multi-functional fidget toy, NOT cube-shaped, in a smooth rounded capsule or pebble form. Size 90–110 mm for comfortable hand use. Must be print-in-place with no assembly or add-on parts. Include integrated mechanisms: a rotating dial wheel with printed axle and low friction fit, a sliding rail with built-in stop clicks, a snap-button section using flexible printed hinges for tactile presses, a sealed rolling bead track inside a curved channel, a small flexible toggle switch, and a twistable outer ring section that rotates around the body. All features must be embedded into the main shell with proper clearance for FDM printing. Layout should space each mechanism evenly for thumb access without overlap. Design must be structurally strong, simple, and manufacturable in one print, with smooth ergonomic curves and clean functional industrial styling. Make sure it is not too small not too big