sillies
sil-lies
noun
A temporary state of playful, often uncontrollable, foolish behaviour, typically among children.
"The toddlers got the sillies and started giggling."
Thesaurus
Synonyms: airheaded, dizzy, featherbrained, lightheaded, light-headed, frivolous, empty-headed, giddy, silly, undignified, ridiculous, pathetic