Kenya is never boring for kids!! All those animals! And that beautiful nature and culture, the people are amazing....
You could not give them more fantastic memories for their future...
It will make them more open to life, other cultures, environments etc,.
In my estimation, it's the best education, travel.
I was there in 1985 travelling for 3 months, went on a week's safari and the 6 year old kid was the most amazing of the lot, not one complaint out of him (it's us adults that are jaded and complain about the "primitive" conditions...)
...and when the truck breaks down, but then the masai come, and a chance to communicate, where do you get that?...
Just make sure you have all the vaccinations and malaria prophelactics, drink only bottled water etc.
But really, kids are so much more resilient than we (paranoid) westeners give them credit for....
the greatest and most open kids - and adults - I've met are those who have travelled....for the love of it, adventure, for work, volunteering, ngo's, family, etc.
I am a travel junkie myself, so dragged my child along too (single mum, had to LOL), I see the results, he is not afraid, of people, of situations, is very sociable, and just went off to study politics at an international university.
I grew up myself as an expat "third culture" kid
en.wikipedia.org/wiki/Third_culture_kid
"Life is like a book and those who have not travelled have not passed the first page" - unknown