Rail SPACEWARP is a suit-toy which could be assembled freedom with its and sometimes scour,it is for adult playing indoor. How to play: For the loop-rail installed already,it just need take little to adjust the corner of rail to ready the rail,it will bring the sweetness and exciting felling of the space rail word to you although it just for playing indoor. Note: Non-recharge battery is not to be recharged. Only batteries of the same or equivalent type as recommended are to be used. Batteries are to be inserted with the correct polarity. Exhausted batteries are to be removed from the toy. The supply terminals are not to be short-circuited. Do not mix old and new batteries. Do not mix alkaline,standard(carbon zinc)or rechargeable(nickel cadmium). Please take out batteries when not in use. Use 6*1.5V AA size batteries.