This portable children's booster chair has been scientifically designed to provide optimal ergonomic support for little ones aged 0 to 12 years. Its studied height allows children to comfortably rest their feet on the ground, keeping their gaze at table level, a fundamental aspect for promoting independent eating and correct posture during meals or studying without the risk of slouching or dangling legs. The stable, non-slip structure is equipped with fixed adjustable straps and large silicone supports at the base, so it fits securely to any chair intended for adults, preventing slipping or tipping even during more lively movements. Made with a high-density foam core, the chair provides firm yet comfortable support, while the removable, high-quality Oxford fabric cover ensures softness next to the skin and durability, as well as being water and tear resistant. The covering is easily machine washable, making maintenance easier and always maintaining the hygiene essential for environments where children spend many hours. The versatile and foldable design of this booster chair makes it easily transportable and compact, suitable for multiple uses: it can be placed on dining chairs, study desks, car seats or sofas, thus offering a practical solution for home, school, restaurants and travel. This product is an excellent choice for those who want to guarantee comfort, safety and correct posture for their children in every situation and environment.