1. Age: 4-6 years old2. Develop cognitive learning ability in English/digital and learn unlocking skills，to develop childrens logical thinking ability3. Easy to switch, smooth and not hurt your hands4. Bright colors and exquisite patterns5. One-to-one correspondence between lock and key6. Healthy PP material, safe and no smell, reject BPA7. Lock size: 6.2×2.7×8 cm, key 7.3x3x0.6 cm Specification: Package Weight One Package Weight 0.40kgs / 0.89lb One Package Size 18cm * 12cm * 8cm / 7.09inch * 4.72inch * 3.15inch Qty per Carton 74 Carton Weight 30.00kgs / 66.14lb Carton Size 50cm * 50cm * 60cm / 19.69inch * 19.69inch *…