Up for auction, I have this great vintage Gemini rocket project set by Parks Plastics Co.  I purchased this item at a local estate sale.  Actually, I think this is 2 sets put together, the Gemini and the Mercury sets.  There are 2 rockets, one with the capsule and parachute.  Instructions for the Gemini set is on the back and paper instructions for the Mercury rocket are also included.  I pressed the pump handle a couple of times and got pressure to the launch pad, so this set should work fine.  Even the original box is in great shape!  Super retro fun!  Check out my other items for more great dolls and toys!  I happily combine shipping. Please email with questions or for more pictures. Thanks for looking!