Kenya was British until 1964. After that Kenya issued several different coin denominations, all with the unique lions, swords, and shield design. Since they are modern coins, they are worth face value unless in perfect, uncirculated condition. If you have an uncirculated coin, a collector might be willing to pay a few US dollars to add it to his or her collection.
There are some proof coins which were issued with very small mintages. These can be worth several hundred dollars each. Proof coins are minted solely for collectors and carry exquisite, mirror-like surfaces.
Proofs aside, the 5, 10, 25 and 50 cent denominations are all of low value. They are minted in various non-precious metals, mostl nickel-brass and copper-nickel. The 1, 2, 5, and 10 shilling denominations likewise are non-precious and are worth only face value.
For denominations 100 shillings and up, gold and silver are used for Kenyan coins and these are worth their weight in the precious metal.