"If you have kids, you may have already started gardening with them, maybe they've grown up gardening, or maybe they've never planted a thing in their lives. No matter how much they know about gardening, they can enjoy these easy-peasy projects for their originality, the fun of seeing results quickly, and the ability to do them both indoors and out. You can actually start most indoors then move them to containers outdoors.
Best of all, with many of these projects, kids can literally eat the fruits of their labor. For many kids, this part alone will be a revelation. It's hard to imagine where food comes from unless you've been in the trenches digging holes; planting seeds, bulbs, sprouts, or seedlings; then watching these living things grow into full-fledged plants that kids can pick and eat.
These projects have been kid tested and have passed the criteria for fun. Most important, kids have declared them all "not boring.""