My church does not have a "Sunday School", because being in church and attending Divine Liturgy on Sunday with their parents is the best school the kids could attend.
However, we do have a Ukrainian School on Saturdays from 9 to 2, where the children have classes studying the Ukrainian language, culture, reading, etc. They also have a class on Orthodoxy....(which sometimes gets interesting as many children are Ukrainian, but, not Orthodox.)
As for Church Camp, we have one each summer for a week. It's always based on a Biblical Theme and teaches Orthodox values, morals, prayers, etc. It's a good way for the kids to get together, learn and build lasting friendships.
As for basketball.... it's "satanic" only in that it pulls our youth (and some adults) away from God. Instead of coming to church, they watch the game, play the game or have practice. Anything that distracts one from God, is evil. However, all things in moderation. Playing basketball is fine, as long as it doesn't dominate one's life.