Chocolate covered fruit!
Get a bag of vegan semi sweet chocolate chips, melt them in the microwave (if you've not done this before, do it VERY SLOWLY, no more than 15-20 seconds at a time and stir, and repeat, because the chips will look solid when actually they're completely melted if you move 'em around), and then dip your favourite fruits. Some good ones are strawberries, banana slices, baby bananas, orange slices, apple slices, cherries, starfruit. Also good are graham crackers, sugar cookies, pretzels. Dust them with cocoa and powdered sugar when they're hardened.
The only things (other than the melting) that you need to remember are...
anything you're dipping must be completely dry
put them on sheets of wax paper (lightly sprayed with cooking spray if you can) until they are hardened
they will harden on the counter, or faster in the fridge.
People are SO impressed by this, and its really simple. Kids can definitely get dippin' and dustin' too. If your chocolate tempers funny and goes white, just roll the hardened choco fruit in cocoa. You could also use white chocolate...