This short collection of projects - some useful, some instructive, and some amusing - can be made for around 10 UK pounds (16 US dollars). The estimated cost does not include an enclosure (box). All of the projects are battery powered, so are safe to build.

Chance your luck with this novel game!

"Two-Up" is a traditional Australian gambling game played everywhere from the remote outback to the glitzy casinos of the major cities. The game is played in a Ring, a circular fenced area crowded around by the participants. In the bush, if they are lucky, the players are protected from the burning sun by a corrugated iron roof.

The game is run by the Ringkeeper, who invites one of the participants to be the Spinner. The Spinner holds a wooden device, the Kip, in which are placed two coins. The players lay their bets on the table, then the Spinner flips the Kip. This action projects the coins into the air and they fall to the dusty floor of the outback Ring.

The coins may fall in one of three ways. As might be expected, two heads uppermost is Heads, and two tails uppermost is Tails. One of each is Odds. The probabilities are 25% for Heads and for Tails, and 50% for Odds.

The Spinner wins if he spins three consecutive Heads before spinning either Tails or five consecutive Odds. If the Spinner manages this successfully, he wins at odds of seven-and-a half to one. If the Spinner is unsuccessful, the game continues with someone else volunteering as Spinner. But this is not all. While the Spinner is trying to throw three Heads in a row, the other players are busily betting Heads or Tails on each spin. They are paid “evens” if they win. If the throw is Odds their bet remains on the table for another spin, but otherwise they lose their stake. After five consecutive Odds all stakes are lost.

In this electronic version of Two-Up, the coins are each represented by a bicolor LED which will glow red for Heads or green for Tails.