Intro to Gears gives preschool children a hands-on engineering theme, using construction to explore connected moving parts rather than offering an undirected assortment of general blocks.

Where it fits

Ideal for preschool builders who like constructing with an adult nearby to demonstrate how one turning gear can affect another.

Worth considering

The gear-specific focus is narrower than open-ended construction, and younger children may need repeated adult explanation before the engineering ideas become meaningful.