Small scissors are not a problem for the TSA.
Always check this page, it changes over time:

http://www.tsa.gov/traveler-information/prohibited-items

Scissors - metal with pointed tips and blades shorter than 4 inches are allowed, but blades longer than 4 inches are prohibited"

Other fun things you can carry-on that you may not realize:

Skates (including ice skates and rollerblades)
Wrenches/Pliers/Screwdrivers (seven inches or less in length)
Common Lighters - sort of OK.
One book of safety (non-strike anywhere) matches are permitted as carry-on items,
Small compressed gas cartridges
(Up to 2 in life vests and 2 spares. The spares must accompany the life vests and presented as one uni
Snow globes that appear to contain less than 3.4 ounces (approximately tennis ball size) will be permitted if the entire snow globe, including the base, is able to fit in the same one clear, plastic, quart-sized, re-sealable bag, as the passenger’s other liquids, such as shampoo, toothpaste and cosmetics.