As a former Infant-Pre K teacher I know its not required to decorate the class but it can help make the classroom feel more personal and loving. Here are some of my favorites
I love the fun weather and season decor for circle time
Weather Board
One of my favorite things to set up in preschool/pre-K is a "calm down corner" a cozy little space to calm down from big emotions
Kids Indoor Tent
Sensory bins are so much fun to plan and organize for me
Sensory Kit
Teachers pay teachers is one of my favorite resources for classroom printables
Free Resources
I love sensory bottles for big feelings management
How to Make a Perfect Sensory Bottle
I love the visual and the group effort of receiving a reward together
Reward Jar
I always kept a small supply of extra hats and gloves for emergency lost ones
Hats And Gloves For Toddlers
Fun ice packs aren't necessary but I always liked when the center had them because it seemed to aid in cheering up a kid with an ouchie
Cute Ice Packs
Fun activities to get to know your classroom
All About Me Preschool Activities: 10 Fun and Easy Ideas for the Classroom
Fidget toys are a must, weather for nap time or for restlessness during circle time
Toddler Fidget Toys
I always liked to have a "talking stick" in my older classrooms to practice taking turns and not speaking over others