How to Say "silly things" in Spanish
The Spanish word for “silly things” is “tonterías” — A2 level. This is a very common word in everyday Spanish.

Examples
Por favor, deja de decir tonterías y habla en serio.
Please stop talking nonsense and speak seriously.
Siempre pierdes el tiempo con esas tonterías en internet.
You always waste time with those silly things on the internet.
Cuando le pregunté por el dinero, me salió con un montón de tonterías.
When I asked him about the money, he gave me a bunch of rubbish/excuses.
Always Plural
Even though 'tonterías' translates to the singular idea 'nonsense' in English, Spanish nearly always uses the plural form 'tonterías' to talk about foolish ideas or silly actions in general.
Using the Singular for General Foolishness
Mistake: “No digas *tontería*.”
Correction: No digas *tonterías*. The singular form (*tontería*) is used only for one specific silly act or item, while the plural covers general foolishness or talk.
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