Not enough information. 1856 was a transitional year when both large and small cents were struck. See the Related Questions for more.
1856 3 cent coin value
$40 to $100 in average circulated condition.
Coins in average condition are valued at $18.00-$26.00
The 1856 Large Cent retails at $15.00-$25.00 for a coin with heavy wear: Medium wear $30.00-$55.00 Light wear $60.00-$90.00 Uncirculated starting at $100.00+
The first 5-cent US nickel was made in 1866, the 3-cent nickel in 1865, and the copper-nickel flying eagle 1-cent in 1856.
Two cent pieces were minted from 1864 to 1873. Please check again and post a new question.
Nickel 3-cent pieces were only struck from 1865 to 1889. If you instead have a silver 3-cent piece with that date, its value would be in the range of $25 to $100 depending on condition.
Check that coin again. Indian head cents didn't come out until 1859.
1856 Large Cent mintages: No exact numbers for the slanted '5', however the combined total of the 1856 cent (straight 5 and slanted 5) is 2,690,463 Source: http://coinauctionshelp.com/BraidedHair_LargeCent_Mintages_PriceGuide.html
Flying eagle cents were minted from 1856 to 1858. Please check again and post a new question.
The 1856 Large Cent retails at $15.00-$25.00 for a coin with heavy wear: Medium wear $30.00-$55.00 Light wear $60.00-$90.00 Uncirculated starting at $100.00+ If yours has a picture of a flying eagle on it, take it to a collector right away. These are very rare.
The first Indian head cent was issued in 1856. A U.S. cent dated 1821 is a LIBERTY HEAD large cent. Most show heavy wear and are valued at $15.00-$40.00 for average circulated coins.