Sunnytech Solar Mendocino Motor Magnetic Levitating Educational Model (QZ02) Stirlingtechonline is exclusive distributor and the owner of the brand "SunnyTech"----Please be sure you receive an authentic SunnyTech stirling with SunnyTech logo and only sold by Stirlingtechonline to ensure 1-year 100% Satisfaction Guarantee. it's a already finish assebmbled toy.you will receive a finised product exactly as the picture,just take it out from the box, and play.No any drilling or soldiering required. See play video : http://goo.gl/574WqQ Matters needing attention: A: magnet attraction is very strong, the assembly of the attention, clamps the hand. B: the top end of the rotary shaft part can not be forced into sharp collision, damage will result in equipment failure. C: because it is pure handmade, part of the fixed use glass glue, tape, easily damaged, please avoid excessive force. D: in most cases, this means you need to manually add external rotation, the rest can give light to complete.