If you like sick kiddos, don't underestimate the value of an ICU or ER rotation. The ER sees every age group, including pediatrics (unless you have a children's hospital in the area, which I doubt because of the lack of NICUs). The ICU will teach you about vents and drips and how to do a thorough, focused assessment. You don't have to like your placement, you just have to learn.
Don't do nursery unless you're interested in L&D. In my not very progessive state, most hospitals have closed their nurseries in favor of couplet care. If you want to do L&D, great (someone needs to do it because I sure as hell don't! ), but otherwise you're not going to get a ton of transferable skills like you would on other units.
Do medical peds and general peds. Put general peds first if you would rather work there. Capstone is a semester long interview and ideally you want to do it on a floor you want to work on.
Seriously consider ICU if you want to do sick kids or ER if you want to do general kids. I promise the ER won't be boring and you'll learn things like septic workups on neonates, how to swab a cranky toddler's throat for strep, and why we give PCP (ketamine) to kids for sedation.