Passive programs are great - you can leave them out all week. Change them every Monday. Count the number you put out and on Friday/Saturday count the number that's still left.
Presto - there's your program. Not a lot of clean up or fuss. So here are some that are perfect for summer reading.
1.
Weekly puzzles - a mix of word searches, mazes, and crossword puzzles. There are plenty on pinterest or you can make your own with
puzzlemaker
2. Coloring sheets: So many for the younger kids, but it's super relaxing and all the craze right now. Check Pinterest for coloring sheets for adults. They don't have to be theme related, but they could be.
3. Library scavenger hunts: This can be as intense or as easy as you want to make it
4. Matching games: Test their sports knowledge. Match the mascot with the sports team
5. Guessing Games: Win a candy bar (or something equally small)