Help me find this book!

[Hurryupbaby11]

When I was little (late 90s) I had a book that contained little mini letters/envelopes you could open within it. I remember one of them being a mini greetings card. It's definitely not the jolly postman books as have those for DS and it's not what I'm thinking of.... Unless I'm totally imagining something from my past!

Any ideas what it could be?

The Princess Poppy books contain little notes

My daughter is 21, and had this

The jolly postman by AlanAhlberg

en.m.wikipedia.org/wiki/The_Jolly_Postman

Illustrated by Janet Ahlberg

@CaptainMyCaptain

The jolly postman by AlanAhlberg

Would that be the same Jolly Postman that the OP specifically says it isn't?

Oops. I missed that bit.

Dear dinosaur?

Not quite envelopes but "Dear Mother Goose" had lift-the-flap letters and culminates in a sort of party.

www.amazon.co.uk/Dear-Mother-Goose-Lift-Flap/dp/1406318329

My DC had one that was about a Christmas mouse that helped Santa. There were lots of letters in envelopes in that.
Can’t remember what it was called, though!

Thanks all, none of those are ringing a bell unfortunately! Think it's the sort of thing I would know if I saw again but am wondering if I have totally imagined it! Will keep trying to think of more details...

There’s one called Dear Santa or something like that. It’s about a little girl and Santa who exchange letters.

Was it 'The Tooth Fairy'? Very pink cover. My daughter had this, about 20 years ago.