Three "Errers"
"There is three errers in this sentence." Can you find them?
Hint: Only two of the errors are grammatical.
Solution: The first error is the word "is" instead of "are." The second error is that "error" is misspelled. The third is that there are only two errors.
Games

Word Magnets
Just like word magnets you might find on a fridge, but online!

Hold the Button
Press and hold the button for a long as you can endure. You might even get on the leaderboard!

Land the Boat
Don't hit the walls, or you'll sink!

Do Not Press
Whatever you do, you must not press the red button.
Puzzles
Doorways
Travel through all the doorways exactly once.
Toothpick Equality
Add a single toothpick to form a mathematically true equality.
Connect the Dots
Draw four straight lines, without lifting your imaginary pencil, that touch all nine dots in the grid.
Toothpick Squares
Move two toothpicks to form exactly four squares instead of five.