Yawning Sirens

Last night when Bug and I got home from entomology Little Man was very tired and wanted me to go cuddle with him for awhile while he fell asleep. So while we are snuggling in his bed he kept yawning. I told him, "I guess you are sleeping you can't stop yawning." He informed me that, "he is so sleepy that his sleepiness is causing his yawning sirens to keep going off." I  had to laugh and hug my son a little tighter. How adorable is that-yawning sirens!