Safe and stimulating toys for parakeets include swings, ladders, mirrors, and chewable items made from bird-safe materials like natural wood, leather, and untreated ropes. These toys encourage physical activity, mental stimulation, and natural behaviors such as climbing, swinging, and foraging. Avoid toys with small, detachable parts or those made from toxic materials that could pose choking hazards or health risks. Rotating toys regularly can keep your parakeet's environment engaging and enriching, contributing to their overall well-being and happiness.