The Magic School Bus Gets Charged

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Field Trip Notes
It's Valentine's Day and the kids are selling lightbulbs. But when they stop at Ms. Frizzle's house to sell her one, her battery-operated doorbell doesn't work. Looking for Ms. Frizzle to tell her the doorbell's broken, Wanda overhears her teacher talking on the telephone...to a man! Want rushes back to the others: 'Ms. Frizzle has a boyfriend, and he's on his way to see her! We've got to fix the doorbell or else she'll never know he's here!' But first they have to figure out how it works...

Make The Flow Go

Going Hands-On

Time: 30 minutes
Group Size: 2-4

The Magic School Bus kids charge through an electrical circuit to discover how it works. Your kids make a simple circuit and switch.

What You Need

For each group:

• D dry-cell battery
• Flashlight bulb (PR2, PR4, PR6)
• 12-inch aluminum foil strip or copper wire
• Paste
• Index card
• 2 1-inch-wide foil strips
• 2 12-inch foil strips or copper wire
• Rubber band
• Tape
• Clothespin (spring type)
• Copies of MAKE THE FLOW GO page

Talk About It

If we have a battery and a lightbulb, how can we light the bulb?

What To Do

1. Before passing out activity sheets, give each group a battery, bulb, and 12-inch foil strip or wire. Fold foil strips lengthwise to make them sturdier. Challenge kids to make the light glow. (“A circuit between...” graphic)
2. Compare groups’ electrical circuits. Ask: What do successful setups have in common? (They make a circular pathway with the foil between battery and bulb.) Let kids draw and label circuits on the activity sheet.
3. Ask: How can we turn the bulb off? (Break the circuit.) Use activity-sheet instructions to make pressure switches. Ask: What do switches do? (They turn electrical circuits and connected appliances off and on.)
4. Ask: Why does the bulb light when you press the foil strips together? (It completes the circuit, or pathway.)

Next Stop

Create a code using the pressure switch to turn the bulbs off and on. Send a message.

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