A bottle cap clock turns simple packaging into a useful wall decoration.
The key is accurate spacing and a clock movement with a spindle long enough to pass through the cardboard.
This project takes about one hour, plus glue-drying time.
Trace a 30 cm circle on firm cardboard and cut it neatly. Mark the exact center. Starting at the top, use a protractor to make twelve marks around the edge at 30-degree intervals.
Check the four main positions first: 12 at the top, 3 on the right, 6 at the bottom, and 9 on the left. This prevents a tilted clock face.
Arrange all twelve caps before gluing. Keep their outer edges an equal distance from the cardboard edge. Once the spacing looks balanced, glue one cap over each mark and let the adhesive cure fully.
Make a centered hole just wide enough for the movement spindle. Insert the spindle from the back, then secure it from the front with the supplied washer and nut. Fit the hour hand, minute hand, and second hand in the manufacturer’s order.
Use a cutting mat and keep fingers behind the blade. An adult should handle the craft knife and hot glue.
Write or stick the correct number inside each cap. Insert the battery, set the time, and leave the clock flat for several minutes. Confirm that the hands move freely without touching each other.
Hang the clock from the movement’s built-in hook or a secure lightweight hanger. Careful marking makes this recycled craft decorative, readable, and fully functional.