Howtoons, a website full of comic style project instructions. Not only are there great graphics, but each one is downloadable as a pdf.
I could see these as great supplemental projects for middle school students. Both for the advanced student who needs something extra to do and as an additional way to engage the slower learner who has trouble responding to a traditional textbook. Because the illustrations are not step by step instructions, students will need to interpret and evaluate. They freely allow for an experimentation mindset.
They could also make great handouts or take home pages for elementary students. In fact, I will probably try a few out this summer with just my kids!