I saw there were challenges to be done, so I started up with the Easy Challenge, when I finished it I eventually got 2 Cubelets. One of the Cubelets gave me Pink Leggings, which appeared in my inventory. But the other item (lava drip arrow trail) I got from it, did not appear into my inventory, it said that I still need to find it in a Cubelet. Can somebody please help me? Thanks.