I've done this bulletin board every year, and the kids (and adults) love it! I send out a letter to the parents asking for random items, and this is what I got this year:) The item to search for changes every day.
Mme Merriman's Classroom: MAD SCIENCE - Bulletin board constructed creatively by science teacher, this is a great visual to be displayed in the classroom for students to learn and can be used with different topics such as earth science, chemistry or physics.
Help students develop a growth mindset with this classroom challenge that includes 20 engaging activities. The activities are meant to encourage resilience, hard-work, dedication, and improvement. Teachers set up the "Growth Mindset Classroom Challenge" bulletin board display that includes 20 hidden activity prompts. Once a challenge is revealed, the teacher finds the corresponding activity in the folder, passes it out to the class, and they are ready to go!