The worksheet maker can be found at Worksheet Works. They have lots of other customizable worksheets you can create on their site as well. To start making the dice worksheet, you just choose how many dice you want per question, they layout of the dice, and the paper size.
Then, this screen will appear. When you click on the link, the worksheet will open as a PDF.
Your PDF worksheet will look just like this. If you go back to the original worksheet options and create worksheet again, it will create a new one with different problems. I created about 3 different worksheets for each level of students. Some of my worksheets had only 1 die to practice counting, while others had up to 4 dice for adding together/counting to higher numbers.