A high chair for children with means for easier activation, comprising a base (2) for supporting a chair (7) that can be arranged at a preset height with a tray (70) that can be supported near the lower ends of arms (3, 4) of said base (2), one of said arms (3) being pivoted (73) to one end of said tray (70), characterized in that the other of said arms (4) engages slots lateral guide (75) slidably said tray (70) to close said base (2) when said tray (70) is rotated.
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