The Explorabook ( <a href="http:&#x2F;&#x2F;www.amazon.com&#x2F;dp&#x2F;1591747996" rel="nofollow">http:&#x2F;&#x2F;www.amazon.com&#x2F;dp&#x2F;1591747996</a> ) came with a Fresnel lens as one of its pages.<p>Yes, a <i>children&#x27;s book</i> came with a <i>Fresnel lens</i> inside!<p>A kid detached his and brought it to summer camp, and after a few days, he was asked to leave it at home.