My suggestion: Soap Box Derby Racing. This is just an example, it's up to you figure out what activity your kids will like. It's the concept that matters.
***MAPS, BROOMs, and RAGS clean the house you worthless shit** NO PHONEs, NO IPADs, NO BOOM BOXs, NO TVsContact your local (or closest) chapter of the AASBD and find out who runs the program. You could start at the top and work your way down:
All 4 of my kids were involved in Derby racing. They all knew that if they didn't help with the cars *and with chores around the house* they didn't race. If they didn't race, they didn't get to hang out with all the new friends that they made from across the country.
You want to motivate a kid? Tell him that his 3 siblings are going to spend the weekend 3 states over, hanging out by the hotel pool with 20 or 30 other racers for 2 nights while he stays home and thinks about the concept of being rewarded for putting in effort.
If they embrace that concept, it will spread across all aspects of their lives. They'll have tools in their hands. They'll build and fix things. They'll know that it takes effort to be rewarded and that working hard pays off. I've seen this work with literally thousands of kids over our 13 year racing career.
I was 100% sure that it had sunk in when this happened:
After 4 or 5 years of racing, my son bought a used riding mower so he could mow lawns to make some money. That's clue #1: If you work, you get rewarded (read: paid). He eventually saved enough to buy a new one. One day he said to me "Dad, I want to buy a cart to tow behind the mower so I can carry rakes and stuff. The cart has small wheels, but the old riding mower has big knobby ones like my new mower. I think we can cut the fenders on the cart and make them fit. Do you want to give me a hand?" That's clue #2: He knew that you can build and modify things to fit your needs. Tools are fun. Building is satisfying.
My point here is you need to motivate them and the best way to do that is to first, find something that sparks their interest, and second, withhold that activity if they take it for granted and don't put any effort into it.