BookBar 4280 Tennyson St.; 720-443-2227; bookbardenver.com July 31:Where’s Waldo party wraps up the month long Where’s Waldo scavenger hunt. Events include Waldo trivia, refreshments and a grand prize drawing. 2 p.m. Free. Aug. 5: BookSpark, a reading group for ages 6-12, will be working on the summer reading program. 10:30 a.m. Free.; After a week of writing, the kids writing campers — in collaboration with Denver Writes — will read and sign their books at the Denver Writes Kids Camp Celebration.