Have you ever try Free Bitcoin sites. There are many sites around the web.
The one i found is https://freebitco.in/ .
Free BTC
You can roll for Free BTC per hour. And you can either multiply or save the earning.
**Multiply **
Multiply your bitcoins up to 4,750x by playing a HI-LO game!
Lottery
There is also BTC Lottery there. You receive 2 free lottery tickets for every FREE BTC roll you play, 1 ticket for every roll your referrals play and 1 ticket for every 0.00000500 BTC that you wager in the MULTIPLY BTC game!
Here's an example of prizes:
Rewards Point
You can also receive 4 free reward points for every FREE BTC roll you play, 2 points for every roll your referrals play and 2 points for every 0.00000500 BTC that you wager in the MULTIPLY BTC game!
You can save your BTC with interest on your wallet there.
You can withdraw your earning only when you get 0.0003 BTC.
There are multiple games, contests and a referral program, too.
Try yourself to know more!