The newest craze in our house is the perler bead magnet. Of course, my boys couldn't make this project easy and use the included instruction books. They want to make Mario Brothers, Pokemon, and other video game characters (which I easily found patterns for on google). These have made much cooler magnets than my lame "I love South Carolina" turtles.
The best thing about this project is they have to count repeatedly.
These beads came in two sizes so I bought the larger ones for C and D. I actually think I prefer the large ones. I just used jewelry cement to glue the magnet on the back after I molded the beads together as the instructions on the bead package stated.