Colgate-Palmolive Mother's Day Free calls for US citizens

Call mom for free, Colgate-Palmolive is giving up to 50,000 people across America the chance to call free if you participate in Mother's Day Instant Win & Sweepstakes.
For that you need to play Mother’s Day instant win Game to win 10 minutes of pre-paid calling and also an entry into a Gran Prize sweepstakes for a yeat of free calls, limited of 5,200 minutes. Please refer their website about how