As a way of getting people to come and have a chat to me at my stand, I set up a "garage" interactive floor projection.
Interactive floor projection is not new, and is based on movement within a video stream. But for most system there is considerable expense and most of the companies in this area charge a fortune for software and systems as if it were "magic".
Last week I found a cool piece of software call Po-Motion - it just uses a standard web camera and a projector to create stunning floor based interactives.
It is not by any means a replacement for an interactive whiteboard - it works on motion rather than objects in this mode - so you actually have to move to make it work - stay still and nothing happens even if you are standing in it.
This kind of sensory experience is fantastic for special needs kids for cause and effect simulations, motivating kids to move and if you include music it turns into a multi sensory experience.
Just watching adults muck around and play with it just shows how much kids would love it - I had several games of virtual soccor going on over the lunch break period.
You can use the same system on a wall.
Just one more thing you can do with your data projector.
If you are wondering why I'm not using the Epson Ultra Short Throw on the floor projection - that's an Epson 485Wi - it is already interactive so I'm showing how the two technologies are similar by projecting onto the table and using the interactive pens.