Firstly begin by revising classroom objects and commands for example "You will need a pen, pencil, a piece of paper and scissors'". Leading on from here you can move onto the listening component of the activity, where students have to listen to the teachers instructions, explaining how to make the chatterbox. This is a really good way to introduce time connectives and instructional vocabulary such as "first you fold the paper". You can also work on more higher level vocabulary such as 'corners'. Additionally you can have the students watch a youtube video if you're not so confident yourself.
You can then choose a theme for the chatterbox, you can start with colours, numbers, animals, objects anything you like. Once you reach the inside of the chatterbox you can either have the students write questions to ask about their holiday or practice questions related to your topic.
I also like to use this activity for future tenses and making predictions, but really there is no limit on how it will support your students learning, it could even be used for giving facts about a particular topic. The students will certainly enjoy it and it's the perfect ice-breaker for any first lesson after a holiday period.
Below is a video of how to make a chatterbox if you've never made one before, or unsure of how it's made.
Happy Summer Term!