In short, I like using 'bonus time' (instead of filling time) to add a little more group interaction and problem solving. Riddles are a fun way to practice asking questions, listening, and deductive reasoning. The riddles in these collections can also be used to open conversations about the topic of the riddles. For example:
What uses words but never speaks?
So, 'Plus' Riddles include some additional thinking and conversation. Along the same lines as Icebreaker Questions at the beginning of a program, I use these riddles after my groups have spent some time problem solving together – later in the program.
Riddle Set Three (Note: clicking on the link will show you a preview of the PDF, it does not automatically download the document.)

riddles_top10evenmore_fd061325.pdf |
Chris Cavert, Ed.D.