Diet Coke and Mentos Engine Page 3
Leave the engine aside and allow the sealant to cure.
Now its time to pop out the Mentos. Take two of them and tape them to one of your strong magnets, make sure that the whole lot will fit through the lid of the bottle. Neodynium magnets would be ideal here as the are small and powerful.
Insert them into the bottle.
Stand the bottle upright and with the other strong magnet drag the mentos and internal magnet up to the side wall. Stick the exterior magnet in place with tape, this should hold the internal magnet in place which in turn will hold the internal one in place.
If you are fairly sure that these will hold in place its almost time to get her to run