Why? Because it’s great for wiggly learners. It’s great for remembering. It works from Pre-K right through to upper elementary, when adjusted to age. It’s good for motor skills. And it’s way more fun than a worksheet.
Here’s how I do it with my kids:
For the very youngest, I challenge them to form a number out of Duplo bricks.
For K-2, I make part of a math fact and challenge them to create the answer out of Duplo bricks.
For older kids, you can use smaller Lego bricks and ask them to illustrate a particular multiplication fact.
This can keep them busy for hours, and they retain the information while having fun. What more could a parent want?