Stemwurks

Description: Pathfinders PFD-56 Sky Surfer Airplane Launcher STEM Activity Kit The new Sky Surfer launches planes in a predictable and repeatable way “ for testing your airplane designs so you can figure out the best way to make planes for long flights,...

Description: Pathfinders PFD-57 Ancient Roman Battering Ram Wooden Kit Battering Rams over the millennia had to evolve as the fortress defenders improved their techniques to repel the attackers. Starting with simple huge logs held by many attackers, to...