Unverified83% confidenceTradeoffTime unknown
珠子越小越考验精细动作但误吞风险和挫败感越高；4岁前优先安全性用大珠，4岁后逐步换1.5cm小珠提升手眼协调难度
1
Sources
83%
Confidence
Long-term
Relevance
-
First Seen
Sources
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