Activities you can do with your child to promote early skills related to simple time concepts and comparing number of objects:
Describe a Difference Between Two Objects
Talk with your child about your surroundings or common, every day observations. For example, you can point out to your child that one baby carrot is longer than the other or one tree is shorter than the other.
At the grocery store or in your home, hold two fruits (e.g., a large orange and a small apple) and talk about which one feels heavier/weighs more. This can be done with various other objects - your child's shoe compared to your heavy boots, or a washcloth compared to a big towel.
Talk About time
For example, "It only took us 3 minutes to clean up those toys" or "It took us 10 minutes to read the book".