Uh! Oh! is an Israeli series of children's picture books about Jewish festivals published by Simcha Media Group (Hebrew) and Yellow Brick Road Publishers Inc (English). On each page, readers search for four items (and for the bonus "Uh! Oh!" speech bubble) that provide information about each festival. The books contain facts, songs, and religious texts (such as a haggadah for the Pesach (Passover) version), as well as games, comics and drawings. The series is written and illustrated by various authors.
Pitspopany Press Pitspopany published an entire line of "UH! OH!" Holiday titles that "not only presented the basics of each Jewish holiday on a simple, easy-to-understand level, but also asked the reader to find the Holiday symbol within the busy full color spreads that appeared throughout the book". These books which follows the same themes as the classic "Where’s Waldo" titles were published with the intention of publish books to cater for the diverse elements of the Jewish market. This series has be reprinted many times, as well as its subsequent soft cover incarnation called "The Energizing Series".
If you find all the Uh! Oh! characters and the 4 hidden objects within one hour, then one qualifies as "Uh! Oh! Tester".