After the time has passed come back and click the exclamation mark above your sims head to find one of the internet kitten collectibles. Every time your sims complete one of the options above their internet kitten hobby skill level up percentage will increase, once they reach 100% they will level up, there are 6 levels. You need to reach level 6 to be able to unlock all of the internet kitten collectibles, once unlocked you will be able to find them.