The Science Museum is an abandoned building seen in Welcome Back, located at Yoyle City. Golf Ball and Tennis Ball went into it to find science treasures, which Tennis Ball claimed himself a Wall Teleporter.
Judging by its name, it should be obvious that this most likely used to be a museum to display science items. The building has greatly degraded compared to how it was in Golf Ball's flashback, with vines growing and walls cracked, implying that it, and Yoyle City could've been abandoned for a long time. There are 680,293 gadgets stored in the museum.
- On the signs, there is a mysterious language over the English text, which probably means Yoyleland have its own language.