A new spin on Christmas
The wonderful Present+Correct has some lovely thaumatrope Christmas cards. That is, those little things you spin with a picture on each side. When it spins fast enough, the two pictures merge together. Hours of endless fun! There are two designs, a partridge in a pear tree and Christmas in London.
The thaumatrope was superceded by the even more unpronouceable phenakistoscope. Fans of this sort of thing may enjoy The Laura Hayes and John Howard Wileman Exhibit of Optical Toys.