Your kindergartners likely count everything they see, which is great for practice. Give them simple exercises such as in this worksheet to stimulate their minds. Ask them to count the recycling cans and then circle the number that shows +2.
Using food and snacks to stimulate learning and interest in topics is a great strategy. Fractions can prove tricky, but this worksheet can help your child become an expert. Have them look for the missing parts of the food to make a whole, then circle the answer.