In the movie Blank Check, this kid's jackass older brothers took his money. Therefore, as a reincarnated child with jackass siblings, it's best to keep your valuables locked up. So instead of immediately buying a game system or laptop or even MP3 player, it would be wise to use your hard earned money to buy a big strong lockable chest. Preferably one with a numeric lock or a combination lock. Then, keep all the stuff you don't want to get stolen in there and keep a close eye on it, in case those jack ass siblings try to break into it. If you know how to hook an ink sprayer to it that sprays anyone who opens it, do it. Here, Casval is guarding his chest from his jackass sister, Artesia.