Minieco share a few templates o make thaumatropes -- cards when flipped back and forth look like they're moving. Simply add thread between the two and flip away to see the show.
52 week projects has a cool and simple tile coaster project using ink and a dropper. She said it's very hard to mess up, making it a perfect project for kids.
Color me online hosts several famous painting coloring pages. This would be great to incorporate with a trip to a museum, especially if you're lucky enough to have one of these paintings nearby or even a virtual visit online to see the original work and to learn more about the artist.
The craft train upcycles tin cans and turns them into a mini golf course. She adds flags and includes a free printable template. She even makes golf clubs out of paper towel tubes and duct tape. Make sure to tape the can to avoid sharp edges.