CORRECTED SENTENCES:

My birthday is september21. = My birthday is September 21.
I call my friend,we meet at playground. = I called my friends and we met at the playground.
I go to my house and we put present. = Then we went to my house to leave my presents.
We went buffet and eat. = After that, we went to a buffet and ate.
We went to the boredgame cafe and we play boredgame.= We also went to a boardgame cafe and played games.
Last we went my home and play. = Finally, we went to my house and played some more.