Okay, these aren’t technically gadgets – no wires, no batteries – but this notebook from Levenger certainly appeals to the science geek side of me. These Special Request Circa notebooks come with a variety of cover designs and page formats. The Skyline cover, with it’s 3-D wire frame cityscape, and the full-grid graph paper caught my attention. (I love graph paper; give me graph paper and a 0.5mm mechanical pencil and I’m in heaven.) The notebooks have heavy-duty plastic covers that last for years, heavy paper, and the plastic Circa disc binding lets you add, remove, or rearrange pages with ease. These notebooks can be personalized with your name, project name, or organization for free. They are available in three sizes (letter, junior, and compact) for $22 – $29. You can buy refill papers and add-ons like tabbed dividers, page markers, bigger discs, paper punches, and more to customize your notebook just the way you need it. I already have countless Circa notebooks, but I feel the need for at least one more.