Need ideas?  Pinterest has some great lists that are age appropriate.

Tween & Teen List
Kingdom of Wrenly (young readers chapter book series)
Warrior Cats (grades 4-8)

Percy Jackson Series (grades 5-8)

Here are some great kid craft ideas.

Kid Craft Ideas
Arts & Crafts

Allow time for the kids to have creative play, alone.  This does wonders for their brains.  It encourages creativity on a different level.  As they get older (teens) this time may be more of an overflow of craft time.