Any Snack Suggestions?

My kids take a variety of things.

apples
clementines
grapes
cucumber
Cheez it and various other crackers
flat pretzel chips (can't think of the brand)
cheese sticks
Pirate Booty
applesauce
pretzel rods with Laughing Cow soft cheese to dip them in
mini muffins
bananas
banana or pumpkin bread
kiwi
Jello or pudding cups
donut holes for special occasions

I would add some fruit and/or veggies. They make containers that have a separate piece to freeze and then attach it to the lid so the contents stay cool.

My kindergartener likes banana chips, snap pea crisps, cut up veggies and a small tupperware of hummus with an ice pack next to it, pirate booty, dried fruit, pretzels, beef jerky, popcorn, a whole apple, pear, plum, peach, etc,

I make my dd protein bars...homemade ones. I basically follow a cookie recipe, but she's allergic to eggs so I have more challenges, but basically:
2 cups whey protein
1/4 cup flax meal
1/4 cup quick oats
1 stick butter
1 cup sun butter
1/2 package mini M&M's
1 package cream cheese
l/2 teasp. vanilla
1 teasp. lemon juice
pinch baking soda
pinch salt
2 cups sugar
mix all together, if still too gooey, sprinkle in self rising flour until cookie dough consistency
Press dough in 2 glass baking dishes 9x13 (spray with non stick)...whey protein seems to burn easily so bake for about 15 min on 325
Cut each glass pan into squares after taking out of oven and cooling
Makes about 2 dozen
My very picky kid loves them and it's the only way to get her to eat a protein breakfast...great to eat in the car!

How about a string cheese? You can freeze them so you don't have to worry about refrigeration. Protein is the missing ingredient in what you listed. Sun butter on crackers (sunflower butter) is another idea-- little sandwiches.

Fruit like bananas and apples. If he prefers apples sliced simply dip them in a bowl of cold salt water when you cut them, it does not change the taste and will keep them from browning for most of the day. Cheese and crackers, cheese sticks. pretzels, raw veggies with or without dip, ect ect. If there is a cold drink in the bag that should be enough to keep the cheese okay as long as snack time is not at the very end of the day.

muffins (the easy to make ones)
Cheese strings
apples
Graham crackers
pretzels (treat)
I make home made rice Krispy squares (that would be the treat)
grapes

Fresh fruit of any kind is great. My daughter always gets fruit, plus either a granola bar, yogurt raisins, pretzels, dried snap peas, or another dry snack similar to what you mentioned. I think having the fruit helps break up the monotony of eating the dry snacks.

If you can keep it cool, you could give him yogurt. A frozen gogurt is usually defrosted and ready to eat by snacktime.

Fruit of any kind is good. To vary it up more, get an insulated lunch bag to put the snacks in so that you can also put perishables like yogurt tubes, cheese sticks, etc.

Fruit cups (in natural juice)
pretzels
cheese (the babybel ones are great for little ones)
crackers
yogurt covered raisins

I usually take along clementines and apples. My kids love most crackers from trader joes, and we do pop corn and pretzels.

If it was me, I'd do cereal, crackers/pretzels and then a clementine or apple. These are forgiving fruits, I usually put them in a water cooler bag with no ice pack and they keep all day. You could also freeze yogurt. The Trader joes or other squeeze stuff has enough sugar in it you don't need to worry :-) lol.

What does he like? My kids have very specific tastes and they snack depending more on need than what's in the bag. Why not ask him what he wants every night?

You could do a mix of dried fruits and cereal too.

Pudding, fruit leather, sandwich(jam, honey, processed cheese, sunbutter) , pretzels, banana, apple, mandarin orange, popcorn, Sunchips, dried fruit, banana bread or muffns.

chick peas, carrot sticks, celery sticks (with sunflower butter or plain), raw cauliflower, raw broccoli, cranberry raisins, grapes, melon cubes, orange or clementine segments (or wedges if easier), peas, left over sushi (vegetable or cooked fish at his age), cheese. Can you not put an ice pack in his lunch bag?