Couldn't Go to Sleep

Sleep at 2am last night and wake up at 9.30am. I am feeling very sleepy now. I wish I could get back to my bed and sleep again. Too bad, my children do not allow me to sleep. They will come into my room and disturbing me. Although they do no need me to accompany but do not know why they just love to wake me up and do not want me to sleep. Why they could not let me sleep a bit longer??