Select a pretend location all of the children are familiar with. For example, select a backyard or basement if the imaginary game is being played at a home, or a classroom if the imaginary game is being played at school. Select one child to be "it" by having them draw straws, pick numbers or select by age. The child who is "it" must think of a place he would hide in the imaginary location. After the "it" child determines an imaginary hiding spot the rest of the children take turns guessing where that spot is. Everything hinges on the children being truthful and working together as a team to figure out which location the "it" child has selected. Children are expected to use the honor system and admit when they've been found. Vary the game by having the "it" child provide small hints about his hiding spot.
Divide children into teams of no more than five players. At preschool age, large teams make it difficult for children to remember who is on their team and who is not. Children must move across the room balancing a napkin on their head. If the napkin slips and falls, the child must freeze in place, standing in the location where the napkin fell off. A teammate must touch the frozen player before that player can pick up his napkin and continue the game. Encourage players to unfreeze their teammates so teams can get as many people across the room as possible. The team who gets all of their players across the room first wins.
Children pair up and take turns being the robot and commander. Each pair stays together, with the commander slightly behind the robot so the robot can hear the commander's instructions. The commander tells the robot how to move so he can maneuver around obstacles and make it to a predetermined destination. Children learn teamwork and improve communication skills. A variation of this game is to blindfold the player representing the robot and have the commander verbally guide him to the destination by calling out directions.
Divide the kids into teams of two or three. Give each team an object to hide. Send all but one player from each team out of the room or use the honor system and have the other players cover their eyes. The selected players will hide their items and then call for their team to return or uncover their eyes. As teammates move around, the child who hid the object will call "hot" if teammates are really close, "warm" if teammates are getting close or "cold" if teammates are not anywhere near the item. The team that finds the object hid by their teammate first wins.