Kids Riddles

Question: No matter how hard you try,
I can open what you can't.
If it wasn't for me,
on your front porch you would stand.

What am I?

Question: What goes up and down the stairs without moving?

Question: Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation.

Note: Each must be used exactly once and no other numbers or symbols can be used.

Question: I go into the water red and come out black.

What am I?

Question: A blue man lives in a blue house. A green man lives in a green house. Who lives in the white house?