The LEGO Duplo Rattles theme, part of the Duplo line aimed at infants and toddlers, featured interactive and engaging toys designed to stimulate early development. Key sets include "Rattle" (1681), which provided a simple, colorful rattle for sensory play; "Rock 'n' Rattle Pull-Toy" (2056), a pull-toy designed to produce sounds and movements to encourage walking and coordination; and "Rabbit Rattle" (1883), which featured a rabbit-shaped rattle for visual and auditory stimulation. These sets were designed with safety and developmental milestones in mind, offering a playful introduction to the LEGO Duplo universe for the youngest children.
The LEGO DUPLO theme is designed for children ages 1 to 5. It features DUPLO figures which are much larger than minifigures and DUPLO blocks which are about twice the length, width, and height of a standard System brick.