Birthday Invitation Wording No Gifts How To Phrase "no Birthday Gifts Required" On An Invitation?

How to phrase "no birthday gifts required" on an invitation? - birthday invitation wording no gifts

I recently joined a group of MOM. I invite them and their children in a local park and have a birthday party for my daughter, now. I do not want other mothers who have the feeling of making a gift and wanted to speak at the invitation politely. Suggestions?