What is the difference between Lego and Lego Duplo?

Lego Lego Duplo
Size of Elements Standard-sized blocks for older children and adults.
Small, allowing complex constructions.
Twice the size of standard Lego in all dimensions, designed for toddlers aged 1.5 to 5 years.
Larger blocks reduce choking hazard.
Age Group Recommended for children aged 4 and older, requiring more advanced fine motor skills and patience.
Designed for younger children aged 1.5 years and up, making it safer and easier to use.
Complexity Offers more complex constructions with many small parts.
Simplified with fewer, larger pieces for easier assembly and disassembly by younger children.
Theme of Sets Covers a wide range of themes such as 'Star Wars', 'Harry Potter', 'Technic', 'Architecture', and others for different age groups and interests.
Focuses on simple, easy-to-understand themes like farms, animals, cars, and everyday scenes for younger children.
Compatibility Fully compatible with Lego Duplo.
Smaller Lego blocks can connect to Lego Duplo.
Fully compatible with regular Lego, allowing for gradual transition to more complex constructions.