I don’t know how I went for so long without knowing about these little beauties. Any toy with a single function operated by AA or AAA batteries (you can get these for other batteries as well) can be adapted by sliding the disk in between where the battery meets the metal on the side of the compartment or in between 2 batteries. Voila! You have a switch adapted toy.
When possible, I suggest permanently switch adapting the toy using stereo plugs (this with definitely be in a future post), but a battery interrupter gets the job done quickly.
Purchase on Amazon.com
I used one with this traffic light when teaching about transportation. Students created maps of their community and added street signs and traffic lights to direct a remote controlled car through the streets.
*Remember, the switch is not the activity. Make sure that swith adapted toy serves a purpose in the larger activity.