Turn empty tin cans into whimsical windmills for your garden. Remove the labels from the cans and paint them in bright colors or patterns. Cut out windmill blades from lightweight metal or cardboard and attach them to the cans using a strong adhesive. Plant the windmills in your garden, and as the wind blows, they will spin and create a playful and eye-catching display. This DIY project is a fun way to upcycle and add a touch of creativity to your outdoor space.