These dolls are bundled in mystery.
Each L.O.L. Surprise! doll, from MGA Entertainment, comes in a plastic ball with seven layers of wrapping. As you remove each layer, it reveals a surprise -- such as stickers or a tiny plastic accessory. Similar to other collectible toys, L.O.L dolls will have a few hard-to-find models, too.
It also comes with a keychain that makes the ball portable. For example, it could easily attach to a backpack. Price: $14 each.