751-Piece Pendulum Clock Building Block Kit

Features: 
-It adopts a pendulum clock shape design, contains 751 high-quality building blocks, and is compatible with building blocks from all major brands.
-The back cover opens so you can install one AA battery (not included) to keep the clock running.
-Using a gear linkage system, you can turn the rocker on the back to make the pendulum swing, while from the front you can watch the gears working in harmony.
-It can help focus, develop hands-on skills, logical thinking skills, and creativity. 
-It is an ideal gift for Christmas, birthdays, New Year, Children's Day, Christmas, Easter, back to school and other occasions.