If you don't know what a PTC site it means Paid To Click. You click on an ad then a timer starts (these sites are all 15-30 seconds) you leave the ad open until the timer runs out then you will recieve credit for it. Honestly it's not something you are likely to make hundreds a month off of but it's something to do in your spare time for some extra money. Once you get started you will really be amazed at how fast the earnings add up. If you have other things that you do from home these sites are also a great way to advertise your other work from home projects. They range in pay but truthfuly I only do the sites that pay $0.01 or more per click.

You can click on the banners or links to get started with any of these PTC sites:
 

(This one is my favorite)
This site has a floating rate prices you are paid for viewing the ads varies from $0.05-$0.50 per ad that you view. Since this site has floating rates it varies how much you get off of each referal viewing of websites. Payout is $40 payable through Paypal. Payments will be made within 28 days of requesting payout.

http://isabelmarco.com/?r=aspiringangel01
You will get paid $0.01 ($0.015 for premium) for each website you personally view and $0.007 ($0.01 for premium) for each website your referrals view. Payment requests can be made every day and are processed through Alertpay or Paypal. The minimum payout is $9.00