Here is one not for the picture books.
Courtney and Hunter were playing "outer space". They went into the sunroom to get dressed up and surprise us. They disappeared for about five minutes. We could hear them working hard to get ready for "space". They walk out, Courtney dressed as usual Hunter as follows (dressed by Courtney):
space helmet (bike helmet)
gloves (used for gardening)
Elbow and knee pads (for bike riding)
Picture this martian with nothing on but space gear. We laughed really hard and wanted to take pictures. Fortunately for Hunter, we thought that the continuity through Hunter's teen and adult years were more important than pictures. Therefore, we refrained from taking those snapshots.