Introduce preschoolers to fingerprinting. Give each child a piece of white paper and have them write their names on their papers. Discuss what it means to be unique or special. Ask them to hold out their hands and look at their fingertips. Explain that no two people have the same fingerprints. Hand out magnifying glasses and instruct the children to study and draw their own fingerprints. Use an ink pad and help the children stamp their fingerprints on their papers. Line the papers up on a long table and direct the students to use the magnifying glasses to observe the differences in each other's fingerprints. Another easy experiment is to show students how their pupils dilate in the dark. Have the children cover one eye with their hands. Take them outside or a place that is flooded with light. Use a mirror to show them what happens to their eyes when they take their hands away.
Enchant anxious preschoolers on their first days of school with a science experiment that will puzzle and delight them. Gather a bottle of soda water and a box of raisins. Show the children the difference between water and soda water, and how the addition of gas makes the water bubbly. Open the bottle of soda water and add a few raisins. Let the children watch the raisins twirl and dance. Put the lid back on the bottle and the raisins stop dancing. Ask the children what happened.
Tap the creativity in children to mix science and art. Lay a piece of Plexiglass, at least 11 by 14 inches, across two chairs, and leave enough space beneath the Plexiglass for the children's arms to move around. Gather a strong magnet and an assortment of small metal objects, such as washers, hex nuts and bolts. Tape a paper on top of the Plexiglass. Dip the metal objects in a bowl of Tempura paint and place them on the paper. Have the children take turns moving and circling the magnet beneath the Plexiglass. Ask each child to then write his or her name with the magnet. Instruct the other students to say the child's name.
Teach the children about animals and have them move and interact at the same time. Ask each child to pull a treat out of a bag of animal cookies. Instruct them to hide their cookies from the other students. Tell them that they can't eat their cookies until they have acted out their animal's sound and movement and the other students have guessed the animal. Have the children form a circle and take turns playing animal charades.