Curtain-climber is a derogatory term used to refer to children who are always hyperactive and mischievous, making them a handful to deal with. However, several synonyms can be used to describe such children to avoid hurting their feelings or sounding insulting. For instance, we can use words like energetic, lively, active, mischievous, playful, or adventurous to describe such kids. In addition, terms like "high-spirited," "rambunctious," or "spirited" can also be used. Using such synonyms to describe children can also encourage parents or guardians to appreciate children's playful nature without necessarily criticizing or downplaying their personalities.