Several research projects have been conducted on handheld devices for applications in museum learning.<ref>[http://edutechwiki.unige.ch/en/Museum_learning museum learning]</ref> Musex is an application in which elementary school students can enhance their understanding of exhibits by collaboratively (in pairpairs) answering related questions via PDA in museums. Musex enables students to monitor each other's status and allows them to move around different exhibits in museums at their own pace. Musex not only promotes the interaction between the students and the exhibits with low interactivity, but also facilitates the mutual communication between students themselves.<ref>Koji Yatani, Mayumi Onuma, Masanori Sugimoto, and Fusako Kusunoki (2004). Musex: a system for supporting children's collaborative learning in a museum with PDAs. Systems and Computers in Japan, Vol. 35, No. 14.</ref>
