Most of our toys for our 5 month old boys are teething related. They love soft rings that they can hold onto, crinkle books and sitting upright in their chairs. These are our favorites that they actually can hold onto: https://www.theydontfeedthemselves.com/early-teething-toys-twin-babies/
Re: 5 month toys
I've also just got mini maracas, sensory balls that are different textures & light up
www.theydontfeedthemselves.com
My favorite activities and tips for surviving different phases with our twins!