Crystal Cube 6"
Crystal Cube 6" - Spring Loaded Version
A large transparent cube is shown empty as you can see all the way through it. Instantly, like real magic, the interior is fill with a large silk, or sponge balls, flowers, spring money, etc.
If you saw Royston South lecture at TRIX in 2018, you'll know what a FANTASTIC routine he has using this prop and sponge stars.
Once again, this is the spring loaded version, and has the advantage that you can see right thru the cube before the 'appearance'. The prop can be set and 'locked' prior to showtime.