Orrery

This orrery shows the sun, the earth and the moon. It was built from a Model of the Month in Meccano Magazine June 1957.

 

 

Electrical connections, showing power through the structure, and picked up from a wiper arm touching the ring (made of channel segments).

 

 

 

Polystyrene balls bought from the London Graphics Centre in Covent Garden - they have a good selection of sizes, cheap and available singly.

 

iPhone apps

RPG Dice Roller - speed up boardgames and RPGs by making dice rolls with a single touch.
Baby Name Chooser - help choose the right name for your baby.

at Langston Publishing