Cut out letters from felt or sandpaper. Have your child practise spelling and feeling the words.
Kids can use "wipe off" crayons on a plastic placemat to write the words and wipe them off again.
Have your child draw pictures around a word that say something about the meaning of the word.
Use letter tiles from Scrabble or Boggle to form words.
Have your child trace words on your back or on the carpet with their finger. Have them say each letter that they trace.
Use alphabet magnets, stampers or cards to spell words.
Roll out pieces of clay and have your child take a sharp pencil and print a word in the clay.
Have your child type out words on a keyboard.
To teach spelling rules like, "I before E, except after C," and "E before I when the word says the sound a as in neighbour and weigh" use cards on which a variety of these words are written. Have your child sort the words into piles and look at what rules apply-- I before E or E before I.
Remember to talk to your child's teacher about the words your child is learning at school and try to use words your child would hear every day.