A control readout beside the launch pad: tower, rocket and astronaut in a column of their own, sticker rows, the age as the mission patch, and the code out on the apron.
The paper already in your printer. Your printer will ask whether to print background graphics — say yes, or the colour is what you lose. If that is more ink than you want to spend, switch to Save ink above and the design comes back as dark type on white.
The code goes to the invitation site itself, so a guest who scans it lands on the countdown, the address and the RSVP — not on an app store.
The name Ava is invented, and so is the party — the QR on this sheet opens the matching sample invitation. Yours carries your child’s name and links to your own invite.