【Brand New, Unopened】 "Gakken Science" Hydrogen Energy Rocket Ages: 6 years old to adult I opened the box to check the contents before listing, but I resealed it carefully so it's not obvious. Reference Price: 3,850 yen (excluding shipping) ● An experimental kit for a genuine science experience The main feature of "Gakken Science" is a science kit that incorporates Gakken's educational material development know-how. The Hydrogen Energy Rocket generates electricity by hand-cranking without using batteries, and launches a rocket by exploding hydrogen made from water. The explosion occurs only inside the launch tube, so it's a safe design, allowing you to launch it at home with peace of mind. Although it is brand new and unopened, please understand that it has been stored at home. #COCO Goods I have other items for sale as well.