I have used these phones for Preschool and Kindergarten. I have made two sheets, bigger and smaller ones.
Print out a few phones, colour, laminate and use as classroom toys so students can dial each others phone numbers and talk to each other.
I have used these phones to talk about emergency phone numbers and the students' phone numbers (their home phone and parents' mobile phone numbers) The students coloured and cut out the phones and we practiced their phone numbers until they remembered them.
If you use them for other activities, please share in the comments.