If you do not understand the common basics of algebra then you will literally be lost forever when it comes to this subject. Being lost in the early stages of algebra can be disastrous because there are many years of advanced algebra just knocking on your door. Once you become more confident and your comfort level increases, you can actually strengthen it by trying to apply simple algebraic applications to everyday life. You will soon find out that algebra is not quite as difficult as you may have once thought.
Another variation is to ask the child to draw. First make some sticks, circles, squares, or other shapes on a page, and encircle them. Make for the child a big "bubble" to draw in, and ask the child to draw either the same amount, one more, or one less. Also have your child practice writing numbers on paper.