Many parents find that simple, high-quality touch-and-feel board books with different textures are a hit for engagement, while some 'viral' DIY sensory play items (like zip-lock bags) may pose a choking hazard or become messy too quickly. When choosing play gyms, look for ones with an attached mat so the structure stays stable during movement. As with all toys, follow your baby’s interests, as their preferences for textures and sounds will evolve quickly.