Any tablet is good for kids. Even if you don't want to spend the extra money on a really good one, get a simple one they can start using. Don't let your kids get left behind in this fast paced tech heavy world.
i got my 19mts son a leap pad ultra. he really enjoys it,to the point he beats the crap out of it. i gotta say this thing is built like a tank. he smashes it, walks on it and drags it around the house. at first i was worried he would break it, after seeing what this little tablet can handle im impressed and worry free.