What age are wooden building blocks best for?

Most classic wooden block sets are rated 2+ or 3+, with smaller cube and unit blocks better suited to toddlers who are past the mouthing stage. Magnetic sets like Tegu are commonly marketed from age 1+, while standard unit blocks shine in the 3-6 range when kids start building more complex structures. Jumbo cardboard blocks are the safest pick for the youngest builders because they're lightweight if knocked over.