Global Potty Training and Step Stools Market Size, Share & Demand Report By Product Type (Standalone Potty Chairs, Potty Training Seats / Toilet Seat Reducers, Travel Potty Seats, Single-Step Stools, Two-Step / Adjustable Step Stools, Multifunctional Potty Chair & Step Stool Combinations), By Application (Household / Residential Use, Daycare Centers and Preschools, Hospitals and Pediatric Clinics, Early Childhood Learning Centers), By Distribution Channel (Online Retail Platforms, Supermarkets and Hypermarkets, Specialty Baby Product Stores, Pharmacies and Drugstores, Direct-to-Consumer Brand Websites), By Material Type (Plastic, Wood and Bamboo, Metal, Hybrid Materials, Eco-Friendly Materials), By Region & Segment Forecasts, 2026–2031