Is it necessary to send my child to pre-school at 2-3yo? If not is there any disadvantages? Like hard to catch up the syllabus compare to others. Thinking to send her directly to K1.

Hihi, all my 3kids start school at 4years old, meaning they start N2.. I will prefer to let them Stay home to have more free time.. Cause once start school it will never stop.. 4years at home is fun for them also..