What age are building blocks appropriate for?

Soft fabric or foam blocks (like the B. toys One Two Squeeze set) are generally marketed for 6+ months because there's no choking or impact risk. Chunky plastic interlocking blocks like Mega Bloks First Builders start around 12 months. Classic wooden block sets are typically labeled 2+ or 3+ because of size and weight — reviewers on r/toddlers specifically warn that wooden blocks hurt when thrown.