2 independently moving nuts
<object width="425" height="344"><param name="movie" value="https://www.youtube.com/v/laty3vXKRek&hl=en_GB&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="https://www.youtube.com/v/laty3vXKRek&hl=en_GB&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>
3D paper design
<object width="425" height="344"><param name="movie" value="https://www.youtube.com/v/0AuKFeDfWHk&hl=en_GB&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="https://www.youtube.com/v/0AuKFeDfWHk&hl=en_GB&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>
Animated illusions
<object width="425" height="344"><param name="movie" value="https://www.youtube.com/v/T5xtRdLOopU&hl=en_GB&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="https://www.youtube.com/v/T5xtRdLOopU&hl=en_GB&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>
and (just a little too late for homemade Xmas decorations!):
Animated spinner
<object width="425" height="344"><param name="movie" value="https://www.youtube.com/v/dbjrbjuMyfE&hl=en_GB&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="https://www.youtube.com/v/dbjrbjuMyfE&hl=en_GB&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>
