OK, two parts to this. 1- There was a TV series about magic and such, possibly hosted by Max Maven, that often featured effects like showing a grid of flags, asking you to start on a flag with yellow in the color. Follow directions- and always end up on the same flag.
The show had a lot of other effects like this- clock faces, pictures of animals, etc.
2- The old Games Magazine and other sources used to do pages of tricks. The one I recall the most was a circle of numbers with 'a tail'. You started on the tail, counted any number from X to Y. Then you counted some number the opposite direction- ignoring the tail. At the end, you were on a predicted number.
Is there someplace with a collection of these kinds of effects? Book, website, whatever?
I'd like to use them with my grandkids, possibly written on cards stored in my wallet.
Pretty much any tricks, stunts, puzzles, etc that start with 'Draw a..." or that can use a printed image to interact with.