Chinese Number

These few days, we have been teaching Celest to say out numeric 1-10 in chinese. She will always say 1,2 then skip 3 &4, going on to 5-10...So strange whenever she skip that. Think she couldn't pronounce the 'San' & 'Si' yet. All the 'S'. It was quite a surprise for me when i heard her repeat after hubby. I seldom hear her say chinese words. Her most frequent words is 'Hi' & 'Bye Bye'. Shall try to video it down. Watch out here for her video!