Wellllll....I won't lie. GENERALLY, Toy breeds are needy and most are actually the opposite of mellow. Chis, for example, are generally high-energy dogs. If not given enough exercise (and they often adore 1 mile walks, believe me), they'll find other outlets. This is where all the stereotypes come in---who hasn't met the barky, yappy, loud, jumpy Chihuahua? Papillons are probably the Border Collies of the Toy breeds. So I guess that's a no-no. I've seen quite a few Iggies, and they're umm...mellow isn't the word I'm looking for... They're actually very needy and high strung, not to mention, difficult to housetrain as is common among the Toy breeds. (I'm just ruling a few popular breeds out according to the bits of information you've given me.)

Pekingeses aren't really recommended for young children because Pekes usually have the personality of the grumpy mommy who's on her lady days *wink wink*. But if your daughter wants a mellow playmate who prefers sleeping over playing tug of war and fetching, then a Peke might work. She's 13 years old, so I'm not really worried about roughhousing, but she still needs to respect the Peke. Generally, Pekes are stubborn. But once you earn their respect and they view you as an honorable leader, they're very easy to train and my own is highly food motivated. They're not lap dogs, mind you, but they will allow you to pick them up and cuddle for awhile (if you earn their trust). Activity wise---They usually adore walks around the block and will benefit from playing fetch once in a while. My own adores socks and balls and we have a blast just throwing and catching. If you need to find a Pekingese breeder, please visit Pekingese Club of America and you will find the breeder referrals OR visit the shelter.

Can I ask you a few questions?
How often do you plan to groom? If the dog requires it, will you make regular trips to the groomers?
Desired Activity level?
Desired size (rethink this question because a lot of bigger breeds are mellow and adore kids)?
Does it need to be small animal/cat safe?
How much exercise can you provide?
Regarding your own dog: No matter what breed you choose and where you acquire him/her, you need to bring your own dog to visit the other in neutral territory. It really does help, and it can prevent many squabbles. Expect a few snarls here and there, and just hang on! Good luck!