I would have round tables in my classroom to increase levels of collaboration. Having the kids work together can help them figure out tough challenges. This helps build community within the classroom.
Chair pillows give students a more comfortable way to sit in chairs. These pillows can help students focus without worrying about comfort or what their sitting on and can put full attention towards learning.
A standing desk gives kids the option to learn with a slightly different perspective. This lets kids move around more during class keeping them interested. This helps the visual learner to get a new way to see the subject.
Bouncing balls let kids who needs something to touch or play with to help focus. Kinesthetic learns can gain a better focus now that they have something to use their hands with. Having something to play with lets kids take a quick break from the learning to calm them down.
Noise-cancelling headphones give kids a chance to create a silent space for them. IF a child is being hyperactive or is just looking for a moment alone A set of headphones can get kids dialed into the zone and ready to learn. This helps with the auditory learners to help them focus during learning time.