A strange country, Kenia is. Every time it finally seems ready to take off, someone goes lala and they have to start all over again. In this case, it was the guy on the coin, Jomo Kenyatta. He started out as an intelligent, well trained, conciliatory leader of the country, leaving it with a one-party system, no opposition and a tribe-based administration. The country is still trying to overcome his inheritance. As long as its puts its presidents on coins, it still has a long way to go, I think.
You are lucky to have found a good 25 cents piece. The coin was intensely impopular and didn't circulate much. Also, Kenya seems fond of brass for its lower value coins, which is badly suited to the climate and sweaty hands.
Peter
