Hello Adriana, engaging kindergarden students can be a challenge and for that reason, it is important to mantain exciting hands-on-activities. One activity that always works well and does not require much is the floating and sinking experiment. It teaches students about making a hypothesis based on the objects we put inside the container with water. Have the children that think that an object may sink to the right of the room, and the students that think the object will float to the opposite side of the room. This will keep them engaged and will learn that denser objets sink. Remember to always keep them busy!