STEM LAB PENDULUMPendulum educational mechanical model kit Model Size: 4. 5*3. 3*6. 6 in (11. 5*8. 3*16. 7 cm) Package size: 8. 1*7. 4*2. 5 in (20. 5*18. 8*6. 3 cm) Number of components: 92 Estimated time of assembly: 1 2 hour Assemble it and discover the principle of working of the Pendulum. Experiment: the model comes with QR code to a Pocket Models Study Guide with a creation story and mechanism design as well as engaging and interesting tasks. Immerse yourself in