Tick tock, tick tock; ensemble your own pendulum clock. Perfect for the person who loves to know how things work, budding time-keepers will get to explore the properties of pendulums and clocks first-hand with this super cool timepiece. The pendulum clock is simple and quick to assemble with no tools required. Teaching how gears work, this clock promotes cognitive development and problem-solving. It operates as a wind-up device - no batteries are required.