Put all materials in a decorated and easy to grab bag:
crayons, washable markers, pencils, paper, safety scissors, craft materials. (include any or all of these)
First Aid kit (and the knowledge to use it).
Words to children's songs--Five Little Speckled Frogs, The Wheels on the Bus, Head Shoulders Knees and Toes, There's a hole in the bottom of the sea, Mary Had a Little Lamb, etc. See Camp Songs.
Game ideas--hokey pokey, I'm a little teapot, duck duck goose, Ring around the Rosy, Motor Boat Motor Boat, Mr. Fox, Hide and Seek, 20 Questions, Oink, hand clapping games
Antiseptic hand cleaner
Paper and pen to write down the telephone number and location where the children's parents will be
Flashlight with batteries
old sheets or old clothes for dress up or making tents (optional)
Here are some more babysitting kit resources:
Babysitter's information sheet - use this form to collect information on children like medication and emergency contact information.
American Red Cross Babysitting Helps download lots of forms and information on how to prepare for a babysitting job
A babysitting kit lesson could be combined with a child and infant CPR course.
Source: Geocities YWLDS, and me, Jenny Smith