Bag - A little heavy, but not a top priority.
Pack - Obviously, change this.
Stove - Consider making an alcohol stove for other trips, but having a gas stove for boy scouts is probably not a bad idea. You'll get the water boiled faster this way.
Mat - That's a heavy sleeping pad! All sorts of options here, from the expensive but comfortable Neoair, to a RidgeRest, to a GG Nightlight. Most find the RidgeRest comfortable, and it's cheap. Many of us use a short-sized sleeping pad and use our packs for under our feet. It works better than you might think, and it saves a good deal of weight.
Pot - You can make do just find with aluminum, but if you haven't bought one yet, consider splurging for titanium. Get a size that'll be a good happy medium between cooking for you and others, as well as cooking for yourself on solo trips. One of the larger Snowpeak mugs would work pretty well and weigh very little.
First Aid Kit - I realize you need to bring a bit more since you're responsible for boys who are more than likely going to need a bandaid or two. Still, you can cut this way down. Perhaps list out the contents and we'll help you sort through them? For instance, how many bandages do you really need for a weekend hike? I bet you can cut this down in half and still feel plenty secure with what you've got. Most of us carry kits that weigh under 3 oz (~90g).
Torch - Super heavy! Bring a BIC lighter for a quarter of the weight.
Feel free to list out the rest of your gear, and we'll help you look at those items as well.