Lots and lots and lots of doggy exercise works wonders when all else fails! Our Buster is 2 years old and adores children - esp. toddlers. My son is only 3 months old so Buster is happy just cuddling with him, but "kids on the move" are a constant source of fascination.
If we're expecting company that includes little ones, we run Buster around the backyard for at least an hour in a rousing game of fetch, soccer or whatever comes to mind. By the time the little ones arrive he's lost his edge and is much calmer which in turn allows for a better experience for both pup and child.
It's not easy having a rambunctious boxer at eye level! Work on the "off" command several times a day using some special reward (chicken bits, liver, etc.) to let Toni know that this command is worth obeying every time. You're in a time crunch and you need a reward that is more appealing than Lauren - so go all out and make listening to the "off" command the equivalent of doggie nirvana. It shouldn't be long before Toni will head for Lauren, hear an "off!" (because you're constantly supervising as should always be the case with kids and dogs!) and turn away from Lauren to look for her reward. Lauren will breathe a sigh of relief, Toni will get chubby (you can scale back the rewards when Lauren leaves
), and you'll have fingers that permanently smell like liver or chicken bits...