Fun activity book for kids?

I do theatre, and in the show I’m in right now there’s these kids that are always looking in my script. It’s the last week of performances and I wanna put something fun in the script for them. Maybe like hiding post it notes with little drawings or some type of messages on them for them to find in the script. I... show more I do theatre, and in the show I’m in right now there’s these kids that are always looking in my script. It’s the last week of performances and I wanna put something fun in the script for them. Maybe like hiding post it notes with little drawings or some type of messages on them for them to find in the script. I need some ideas of what to do! If you come up with any cute ideas or something I’d love to know!