My new 12-week old, Bella, seems to think that 3:30, 4:30, 5:00, 6:00 is prime time to play with me and my other 11-month old kitten, Boo. She nibbles on my ear, licks my eyes and lightly bats my cheek in an effort to get me to play and then the two of them go at it full force playing, nipping, rolling around, racing across the room, jumping up on my bed and me and then jumping off the other side - only to do it all over again. I don't have the heart to lock them out and I know they would only cry and scratch at the door. I play like crazy with them before bed and even feed them late. Any suggestions? I'm exhausted!