This page of the Astro's Playroom guide provides information about bot models: collectibles that can be obtained in a gacha game.
In the PlayStation lab, opposite the entrance, you will find a machine. You have to spend 100 coins for each pull.
In addition to the puzzle pieces, artefacts and soda cans, you can collect 20 bot models. Collecting the models unlocks bots, which from now on will appear at the desks in the laboratory.
It is worth to pick up all the models, some of them are needed to get trophies.