The best activities are always the simplest ones! Here is an activity that takes nothing more than a cardboard box, golf tees, and an enthusiastic builder. Using a toy hammer, have little ones drive golf tees into the top and side of a cardboard box. Depending on the age of your little one, you may have to initially punch the holes to get him started. Lining up the golf tees uses hand-eye coordination to meet the hammer to the tee.