The Tumble Forms TriStanders 45, model 4525S, and Tristander 58, model 4530S, are prone, supine, and vertical standers designed to provide versatile standing options for children. Both standers combine the stability of a tubular steel frame with the comfortable firm foam positioning modules by Tumble Forms. Foot-operated pneumatic tilt mechanisms adjusts the standing angle from 15 to 90 degrees, allowing the standers to be used in vertical, prone, and supine positions. The adjustable module cushions secure the user at the trunk, knees, hips, and feet. The cushions are seamless, impervious to body fluids, and wipe clean with a damp cloth. TRISTANDER 45: This model accommodates individuals from 32 to 45 inches tall and includes a detachable head support module for use during supine positioning, pelvic support pad, and a trunk positioning vest. The independent footrests tilt 5 degrees forward or backward, and rotate for prone or supine positions. FRAME: 21 inches wide x 37 inches long and includes locking swivel casters. OPTIONS: Foot-shoes with bar, activity tray, foot plate, and others. TRISTANDER 58: This model accommodates individuals 45 to 58 inches tall and includes a detachable head support, pelvic support pad, and a trunk positioning vest. FRAME: Includes locking swivel casters. OPTIONS: Foot-shoes with bar, activity tray, foot plate, and others.