Why Oh Why?

Why oh why won't my children fall asleep in their beds? Abygail falls asleep right outside her bedroom door. Jaycob falls asleep just inside his doorway! When we go to bed we move both of them to their beds. Abygail gets up appx 3am and moves back to the floor at the foot of Older Sister's bed. Jaycob has been staying in his bed the last 3 nights, but before that you'd find him on his floor come morning too! What do they have against their beds??