I have my grandbaby and he stays up half of the night?

last night i woke up on the couch cause my grandbaby wouldnt come sleep in the bed he said he was scared of the boogey man so i told him grandma is a power ranger and i have a bat ,and that boogey man wont come here .but i had to stayand sleep on couch with him so i woke up at 2 in the morning and i felt like i was a toy story for his toys surrounded me he was awake. tonite he is in the bed with me and wont go to sleep again he has more toys in here . how can i get him to lay down to sleep we have played and run all day i am so tired , i only get to see him rarely i dont wnat to fuss at him , i read him stories got any ideas besides the obvious ,he is scared of the dark.