Celebrate a 5th birthday with a "Galactic Adventure" theme! Kids can build cardboard rocket ships, hunt for alien treasures, toss meteorite bean bags, and tackle an astronaut training course. Decorate with a galaxy backdrop, space table settings, and planetary balloons. Party favors include space slime and astronaut certificates. Invitations can be mission briefings, and the cake can be a planet or rocket. This theme is perfect for a fun and imaginative party!