Bobová dráha Prosek (Bobsleigh Track)An 800-metre downhill bobsleigh track with two loops and single or double sleds, plus a rope park, café and children's play area. Fun for all ages; go at a quiet time, as queues build quickly.
Mirror Maze, PetřínA little castle-like building atop Petřín Hill housing a short mirror maze, a battle diorama and a hall of funhouse mirrors. Quick and low-key, but a fun break in a walk through the hilltop gardens (reachable by funicular).
Petřín Lookout TowerA lookout tower on Petřín hill reached by funicular, with a climb or lift to views across the city. The hill also has gardens and a mirror maze.
Railway Kingdom (Království Železnic)A huge indoor model-railway world in Smíchov, with detailed miniature Czech towns, trains crossing tiny bridges and a day-to-night lighting cycle. Buttons to press, driving simulators and a play area keep kids busy.
Triassic Children's Park (Trilopark)A small, friendly palaeontology spot in Nusle where kids handle real fossils, dig for dinosaur skeletons and cast plaster models in guided workshops, alongside life-sized prehistoric animal models. Look for the trilobite painted on the building.