How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.
An hour glass, sometimes called a sand clock, keeps time. In this activity, your child will make her own sand clock, and measure the time it keeps.
Here's a fun math and science activity: help your first-grader explore four different kinds of measurement, using his hand and a few simple household tools.
Strengthen your first grader's science observation skills and understanding of the concept of time with this classic "Shadow Clock" activity.