Sometimes, a toy comes into the office and everyone just sits gawping at it, struggling to remember the time before it arrived. The Space Coaster Marble Run is one such toy - an indescribably cool piece of sci-fi silliness that's part marble run, part physics experiment. After you've constructed it (a pretty epic and rewarding task in itself), simply turn it on, put the two ball bearings in the central shaft and watch them whiz round the rail at breakneck speeds. It's a self-perpetuating Ouroboros of a toy, guaranteed to turn any frown upside-down, and possibly into a vacant stare of wonderment.

There are a number of different routes for the balls to go down and a junction at which they randomly determine it: they will either be sent wheeling around hairpin bends or careering through a rather exciting loop-the-loop section before returning to the bottom of the central shaft, which will lift them to the top again. It's a madcap, self-perpetuating gizmo that will delight kids and adults alike. Perfect for anyone with an interest in science and building things (there's over half a metre of rails to assemble), it's hypnotic, mesmerising and oodles of fun.

Features:

• The Space Coaster Marble Run is an amazing, self-perpetuating marble run.
• Great for anyone with an interest in physics. Or marbles.
• Contains over 50 cm of rail to assemble.
• Assembly is quite a task in itself.
• Central spiral shaft lifts balls to the top of the run.
• Balls (2 included) can travel through a series of hairpin bends or through a 360-degree loop.
• Potentially never-ending spectacle (at least while the battery lasts).
• Requires large flat surface.
• Requires 1 x R14C battery (to power the central shaft, not included).

Size:

• H: 36 W: 59 D: 18 cm.