Generally, preschool worksheets are designed for children aged 3-5 years old, but even within that range, there's a wide variation in readiness. A 3-year-old might be ready for very simple matching or coloring activities, while a 5-year-old might be tackling pre-writing and basic number recognition exercises.
Consider these factors:
* The child's developmental milestones: Does the child have the fine motor skills to hold a crayon or pencil? Can they follow simple instructions? Do they show interest in the activity?
* The worksheet's complexity: Some worksheets are highly simplistic, while others are more challenging. Choose worksheets appropriate to the child's abilities. Don't push a child to complete something they find frustrating.
* The child's engagement: If the child is bored or frustrated, it's time to move on to a different activity. Worksheets should be fun and engaging, not a chore.
In short, there's no magic age. Use your judgment, observe your child's abilities, and choose worksheets accordingly. It's far more important to focus on fun and engagement than on rigidly following an age guideline.