The Juice Box is a low cost multimedia player made by toy manufacturer Mattel. The player features a screen with a native resolution of 240×160 px and runs μClinux, a microcontroller version of the Linux kernel. It has 66MHz ARM7TDMI architecture Samsung processor, 2 MBytes or 8 MBytes of RAM and 8MB of ROM. It was marketed as a portable media player for kids. The player only played a proprietary cartridge format. Nickelodeon, 4Kids Entertainment, and Cartoon Network put some of their shows on cartridges. However, the small screen and poor quality (6 frames per second maximum) alienated most people. Furthermore, the device entered a crowded market. Its most potent rival was the Game Boy Advance, which not only had TV shows, but could also play video games. Thus many retail stores were left with a surplus of the device. Original retail price was about US$70. As in 2008, the player is cheap enough to be a good platform for hobbyists to experiment with design concepts, as it uses a Linux based operating system.