So that all the little party guests know about the upcoming children's birthday party, it is best to send rectangular invitation cards . An Olchikind smiles at you on the 8 green cards, underneath the words " Invitation ". The following fields can then be filled out on the back: " For ", " You are cordially invited to ... ", " Date / time ", " Where ", " Are you coming? Please call: .. " and "Krötige Greetings ". The 13 x 14 cm large Olchi invitation cards are decorated with small flies and Olchi children.