This has taken up most of my fishing time on weekends. Working on it here and there since beginning of summer. They have been sleeping in the bed for a month or so now.
Here's what 6 sheets of plywood will get you these days. Plus some other materials of course.
Ana White Castle Bed Loft customized to a bunk bed.
It is actually three separate pieces (stairs,center,slide) and also the only way to get it in the room.
Here's the final product after the girls helped decorate it and I added about 8 coats of urethane to the slide...for speed.
I have a happy 6 & 4 year old now.