kid stuff

基本解释

It's that greasy kid stuff.
小孩子用的東西。
Margo: Oh, now, Bill. You know how much I do. But over a phone? Now, really. That's kid stuff.
瑪歌：比爾，你知道我有多愛你。但是在電話裡麪？那是小孩子玩的把戯。
vip.book.sina.com.cn
All right, I always have to think hard when I do this because when we deal with bullets, that is no kid stuff and I... as I said I have really no experience firing guns.
每次做這個實騐的時候,我都左右爲難,因爲要動真槍，這可不是過家家,此外，我…,對射擊真不在行。

Lin was a blogger on Xanga, as noted by Reddit, when he was in high school, but that was kid stuff (and he has since made the account private).
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According to Chua, who expounded on her ideas in a popular book, Battle Hymn of the Tiger Mother, the typical Asian mom prioritizes academics and musical accomplishment (in classical piano and violin only) over typical fun kid stuff like sleepovers and playdates.
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All their licensed kid stuff.
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