I sleep in the boys' room with them (also have a 4yo) and we actually have a nice routine for the older boy, but my toddler just won't play along - he uses all the tricks in the book to keep himself awake. He wakes 3-4 times per night, sometimes wanting to play in the wee hours and takes up to 3 hours to fall back asleep. He naps once for 60-90 minutes in the afternoon - and he goes down easy for his nap. Aarghh.
Any tips, suggestions, or reassurances that it won't happen again (right) would be greatly appreciated!