Unverified50% confidenceDecision RuleTime unknown
3岁以下幼儿必须选择颗粒直径≥3.17cm（大颗粒）的积木，避免误吞窒息；标准小颗粒积木（如乐高经典款）适龄标注为4岁以上，实际建议6岁后玩
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