John Deere SIMPL DIMPL. Young or old, this unique John Deere Tractor keychain provides endless hours of fidget fun! Perfectly sized to fit any set of keys, or attach to a backpack, the Simpl Dimpl is a simple delight that's hard to resist. The tractor is made of strong, high-quality plastic and the two colorful buttons are made of 100% silicone. One touch and your fingers can't stop pushing, poking, and popping! Age: 3+.