You have to visit your Lego store April 15 or later to register for the build on May 3-6, and signups are limited. For ages 6+
Tantive Make and Take
May 3-6: Come in to your local LEGO Store to build your very own Tantive model then take it home, for free! Registration is on a first come, first served basis and quantities are limited. Registration begins April 15 in stores only. The building event is intended for ages 6+ at store discretion.
https://www.lego.com/en-us/stores/events/tantive-make-and-take-7426d1f3d86b483c9d9ba3e74faf7aa2