Little Alchemy 2 is a really unique game that the school has not blocked yet. You start with certain materials and combine them (Fire, Water, Land, etc.) I also enjoy using secret rick roll to prank my friends >:) For TierMaker you get to rank different things of the same category on best to worst. Also, if you're looking for a challenge, try 2048. It is an educational game where you try combining numbers to get a bigger number.