time in
n.— «He admits his proposal to give the child “time in” rather than “time out” requires great control and understanding on the part of parents.» —“It’s time out for time outs, psychologist says” by Trish Crawford Toronto Star (Can.) July 27, 1998. (source: Double-Tongued Dictionary)
Further reading
After misunderstanding the term tummy ache as tummy egg, a three-year-old has questions. This is part of a complete episode.
Related
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...