Tomy ® Stretch Legged Stoomdorm - air-powered pneumatic gizmos marketed as "Space Pets. ® " This works well when pumped with air, which propelled itself in an accordion-like fashion, and moves with a kind of scissor extending assembly. Pump him up, and away this creature goes. Stoomdorm Made in Japan dates from the 1980's.
Source: internet, My Collection, International Hobbyist Collection - Updated 08-14-2020