If your budget is approximately correct, you are doing great!
Close to 50% savings rate despite 3 kids, child care, etc.
No car loans, student loans or other.
Maxing out all registered savings vehicles.
Charitable donations as large as your dining budget (For me, this plus entertainment, and clothing for adults is where I look to whenever I start to think I should cut back on donations..I have a ratio I try to maintain)
As someone pointed out, there may be some flex in the budget, but it closer to $400 than $3000 per year.... and raising kids requires some budget flexibility, too.
Speaking of which -- do you have all the medical deductions / extra expenses / school fees etc covered, do you think? I was surprised how much a little here and there for the kids will add up.
OOH... ETA --
@MDM , this is your sample budget, and you are doing Great!