Makey Makey Projects: Makey Makey is a board that hooks into the computer via a USB and can control things like the space bar and cursor keys. You can get it to interface with Scratch and make some really cool projects. Try the Operation game, Frustration game, Floor piano, Interactive Models. See what else you can come up with.
Pets: Have a furry pal and want to make him or her some cool tech. Why not make them an automatic feeder? Here's a pet feeder based on Lego Mindstorm. Maybe kitty would like a bubble fountain to play in. Maybe you want fluffy to stay in at certain times, this curfew door would help.
Jewelry: We have a lot of equipment in the room that can make some sweet jewelry. Think of these links as a starting point. Feel free to add to them. Try some nerdy circuit board earrings, maybe a steampunk necklace, or maybe you could make a jewelry box and add some sensors to detect if someone is stealing your precious jewels!