836PCS 413PCS 800+PCS 100+PCS 18PCS 36PCS Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 4.3 out of 5 stars 6 4.6 out of 5 stars 210 5.0 out of 5 stars 1 4.5 out of 5 stars 149 4.1 out of 5 stars 63 4.2 out of 5 stars 88 Price $39.90$39.90 $25.69$25.69 $29.90$29.90 $9.99$9.99 $49.29$49.29 $49.99$49.99 Compatibility ✓ ✓ ✓ ✓ ✓ ✓ Quality-price ratio ✓ ✓ ✓ ✓ ✓ ✓ Higher quality ✓ ✓ ✓ ✓ ✓ ✓ Post-sale ✓ ✓ ✓ ✓ ✓ ✓ Technic Parts Group EV3 Replacement Building Block Parts Regular-Sized Mechanical Parts The set can be applied to assembling, connecting parts, designing and building projects, when the building block part is lost, it can be used as a substitute for assembly. STEM activity kit,DIY creative model, can be freely assembled to create new design. High compatibility, easy to assemble and disassemble, good compatibility between brick parts, neither loose nor tight. It can be used to build models of robots, cars, cranes, construction vehicles, and more. Fun and useful features for your technical model, a great gift choice for building block lovers.