This is a physical representation of the Bitcoin blockchain. With the naturally behaving chains, you can move the model around and display it with the blocks arranged in different positions. Your visitors will wonder and ask what it is, and you have yourself the perfect opportunity, served on a silver platter, to introduce them to Bitcoin and blockchain technology.
This model can actually take some slight playing and fiddling to a certain degree (but of course, don't let children play with it). Each block is around 2.5 cm wide (~1 in) with a Bitcoin logo on the sides.