There are various toys available that can help stimulate and enhance cognitive development and critical thinking skills. Here are some examples of best toys for promoting mental growth and engagement:

1. Building Blocks: Toys like LEGO or magnetic building blocks allow children to explore their creativity, problem-solving, and spatial reasoning skills as they construct various structures.

2. Puzzle Games: Jigsaw puzzles, brain teasers, and puzzle cubes challenge children's problem-solving abilities, logic, and spatial awareness.

3. STEM Kits: Science, Technology, Engineering, and Math (STEM) kits provide hands-on learning experiences with experiments, coding, robotics, or circuit building, fostering logical thinking and analytical skills.

4. Board Games: Games like chess, Scrabble, or strategy-based board games encourage critical thinking, planning, decision-making, and logical reasoning.