Looking through some of the posts about food frustrations, I have a couple of thoughts. First, though, our son (8) was diagnosed 5/13/09. We're not "experts" by any stretch of the imagination, but we've been pretty successful at managing his BS with the training and assistance from our ped endo. So, I'm just passing along what I've learned about T1 management.
There are a number of insulin programs out there. When our son was initially diagnosed, the hospital's endo put him on a R/N insulin program. He received a fixed dose of R/N insulin three times a day with a sliding scale correction, and a dose of Lantus in the evening. He was pretty much restricted in his meal plan, because he had to eat the number of carbs per meal/snack dictated by the insulin program he was on.
When we got back home (we live in Atlanta, GA, and his onset occurred while we were on vacation in Orlando, FL), we immediately got in to see a local pediatric endocrinologist. The first thing he did was change William's insulin program, so William could eat anything he wanted during meals and snacks. Now, William gets Humalog with each meal/snack, based on a carb/insulin ratio determined by the endo for each meal/snack, and a sliding scale correction. He also gets 10u of Lantus with supper. As challenging as BS management can be with kids, with all of the hormone fluctuations, changing activity levels, illnesses, etc., this has been a GREAT program for keeping good control of his BS. His first A1c, three months after diagnosis, was 6.5. It takes a little more work, testing 5-6 times per day, calculating doses, and injecting 4-5 times per day, but it's really working well for us.
So, if your insulin program is not working well for you, I would really encourage you to talk to your endo about changing it. If your endo is not open to doing that, start looking for another endo if you can. And, if possible, go to a pediatric endocrinologist. They will have a better idea of what parents are dealing with trying to manage their kids' BS than an endo who primarily treats adults. Ideally, your child should be able to eat anything they want during meals and snacks, and not be hungry between times. Kids need carbs! And, their carb requirements vary depending on a dozen different influences at any given time. It's just not reasonable to expect them to stick to a fixed meal plan, or a fixed insulin program.
If you're looking for specific suggestions for low-carb snacks, there has been an ongoing discussion in the main Juvenation community.
Let me know if you have any questions, and I'd be happy to answer them to the best of my ability.
BTW, I'm reading a fabulous book on diabetes management with insulin called "Think Like A Pancreas" by Gary Scheiner. I highly recommend it for anyone ready for further "info and training" in T1 management.