Friend has a toddler born on Boxing Day (2005). Due to its proximity to Christmas, she wants him to have birthday celebrations at his 'half-birthday' in June.
Some friends naturally already bought him presents for his 'actual' birthday. How can she word the party invites to say that people shouldn't feel the need to bring a present if they already gave one (pref without suggesting to those who haven't already been generous that they shouldn't )?