There is only one objective used to store the particles. Let's say that you wanted to purchase a particle and be able to equip and un-equip it. Let's say you had 5 particles. You would also need to be able to test if that item was already purchased by the player and give them a message saying they already purchased it. You would also need to be able to equip and un-equip it (like I already said), but not in a cycle. This system does it with only one objective storing the data for the particle. Also, sorry if I sounded rude in the comment before (I was kind of mad at my parents for them doing something ridiculous :P).