POP-UP AND MOVEABLE. SKY-HI: A TRIP INTO SPACE WITH TERRY by Mara. Personal History Agency: 1952. Oblong 4to (10 1/2 x 8 1/2"), spiral backed pictorial boards, near fine. Terry falls out of dreamland and begins to fly to the planets where he encounters each planet in humanized form. The scientific symbol for each planet is integrated into the figures and characteristics behind the name are offered. Illustrated by the author in bright colors on every page in typical 50's naivete and featuring 2 pop-ups, a rotating dial and a die-cut figure of Terry on the cover that the child can rotate. Designed to teach without being didactic.