Hi Saidi --
Your coins are modern (dated after 1948) and they are not made out of gold or silver. As such, your coins are worth face value: 10 cents in Kenya.
A coin collector might pay a few cents more than that, but not much more.
For info about modern coins that are valuable, see:
https://coinquest.com/cgi-bin/cq/coins.pl?action=moderns
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