[1] Gymnocalycium paediophilum is a clumping cactus with round to short cylindrical green stems, 10–20 cm tall and 5–8 cm in diameter, with 6–10 slightly warty ribs.

Its pink to light red flowers, which open widely, measure 4.5–6 cm in length and 5–6 cm in diameter.

[2] This species is native to the Boquerón, Paraguay department of Paraguay growing in quartz and rocks at elevations from 220 to 270 meters.

[3] Gymnocalycium paediophilum was first described in 1979 by Friedrich Ritter.

The epithet paediophilum, meaning "child-loving", references the numerous children Ritter educated.