Try this family approved web search engine Crafty Kids has over 150 easy to make crafts for kids.
Most crafts are inexpensive to make.
Each project has a list of materials and step by step instructions. Kids in preschool through elementary school will enjoy making these crafts. My kids an I have always enjoyed doing craft projects together. And as a Girl Scout leader, I am always on the lookout for easy to make crafts. I particularly like crafts which can be made with recycled materials or materials which you normally have on hand at home.