Wikijunior:Big Book of Fun Science Experiments/Keep your mouse warm

The things needed to set this experiment are:

 * Straw
 * Thermometer
 * Water
 * Boxes
 * Small medicine bottle with child proof lid

What to do
To make your mouse warm, you must pour warm water (37 C) into the bottle. Then you have to put some straw into a box then put it into an ideal outdoor place for a mouse. Do this with friends and see who has the hottest den.