There are soo many things you can make! I love making things with duct tape; I make purses, wallets, coin pouches, and flowers. Here are some youtube links:
really cool coin pouch:
http://www.youtube.com/watch?v=CuLEkb0ADSg
different types of wallets:
http://www.youtube.com/watch?v=IAAicTg2tjo
http://www.youtube.com/watch?v=0_lMqCe2mvI&playnext=1&list=PL27358C1440510B8A
purses and bags:
http://www.youtube.com/watch?v=zccyrkTKuJM
http://www.youtube.com/watch?v=zqKLqbQTlpY
http://www.youtube.com/watch?v=hp2oopmH74M&feature=related
flowers:
http://www.youtube.com/watch?v=RoJI0KfJXB8
other random stuff:
http://www.youtube.com/watch?v=lslvw-XuLG4
http://www.youtube.com/watch?v=csaggZ2s4HA
http://www.youtube.com/watch?v=85sWMo4lgAw
ps: i had more links in there but yahoo answers made me take them off